Answer: 2.3x is the answer
Nicola needs to put up bunting around a whole room
for a party.The room is 4m long and 3m wide.
she has lots of 70 cm lenghts of bunting.Every time she ties two pieces together she needs to use 50mm of each piece of string for the knot. How many pieces
of 70 cm long bunting does she need to go right around the room ?
The pieces of long bunting is 22.
From the question, we have
The room is 4m long and 3m wide.
perimeter of room = 2×(4+3)
=14 m = 1400 cm
she has lots of 70 cm lenghts of bunting.
1400 cm/70 cm = 20
she needs to use 50mm =5 cm of each piece of string for the knot.
20×5 = 100
100/70 ≈2
pieces of 70 cm long bunting = 20+2 =22
Divide:
Split is to divide into two or more equal sections, places, groupings, or divisions in its most basic form. To divide something simply means to provide it to a group in equal quantities or to cut it up into equal pieces. Let's imagine a diagonal divides a square into two triangles with equal areas. An integer may or may not be the result of a division operation. Sometimes the result will be expressed as decimal numbers.
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6.
The Cookie Jar offered a special deal on Valentine's Day. Buy I dozen cookies
for $6.00 and get 3 cookies free. Mrs. West bought 3 dozen cookies for her
class at school. How many cookies did she get altogether on the special deal?
Answer:
Step-by-step explanation:
It has to be $3.00 because It says Mrs. West bought 3 dozen of cookies and she has $6.00 and the cookies had to be 1$ each so the answer should be $3.00 ( sorry if I'm wrong)
A certain element has a half-life of approximately 15 hours. How long would it take
for 500 grams of the element to decay to 299 grams? Leave your answer as an integer
or simplified expression.
Using an exponential decay equation, we will see that after 11 hours the element will decay to 299 grams.
How long takes to decay?We know that we have an element with a half-life T, and it has a decay equation that can be written as:
f(t) = A*e^(-t*ln(2)/T)
Where A is the initial amount of the element, and f(t) is the amount of the element t hours after.
In this case the given values are:
A = 500g
T = 15h
Then the exponential decay is:
f(t) = 500g*e^(-t*ln(2)/15h)
And we want to find the value of t such that f(t) = 299g, then we can solve:
299g = 500g*e^(-t*ln(2)/15h)
299/500 = e^(-t*ln(2)/15h)
If we apply the natural logarithm in both sides we get:
ln(299/500) = -t*ln(2)/15h
-ln(299/500)*15h/ln(2) = t
11 h = t
It will take 11 hours to go from 500 grams to 299 grams.
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Find the range and standard deviation of the set of data.
11, 10, 5, 13, 16
The range is 11.
(Simplify your answer.)
The standard deviation is ____
(Round to the nearest hundredth as needed.)
Find the standard deviation please
The range of the set of data is 11 and the standard deviation of the set of data is 4.06
What is Standard deviation?
The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a wider range, a low standard deviation suggests that the values tend to be close to the established mean.
Given, set of data.
11, 10, 5, 13, 16
First of all we will arrange them
5, 10, 11, 13, 16
To find the range we have to;
Range = Biggest number - smallest number
= 16 - 5
Range = 11
Thus, the range of the given set of data is 11
Now, for standard deviation,
By first squaring the discrepancies between the observations and the mean, and then taking the square root of the sum of the squares of the differences divided by the number of observations minus 1, the standard deviation is computed.
Mean = Sum of Observations/Total Observations
Mean = (5 + 10 + 11 + 13 + 16)/5
= 55/5
= 11.
Square of the mean = 11² = 121
Now subtracting the mean from each observation and squaring it gives:
(5 - 11)² = (-6)² = 36
(10 - 11)² = (-1)² = 1
(11 - 11)² = (0)² = 0
(13 - 11)² = (2)² = 4
(16 - 11)² = (5)² = 25
Sum of squares = 36 + 1 + 0 + 4 + 25
= 66
variance = 66 / n-1
= 66 / (5 - 1)
= 66 / 4
= 16.5
Standard deviation = √variance
= √16.5
= 4.06
Thus, the Standard deviation of the set is 4.06
Hence, The range and standard deviation of the set of data is 11 and 4.06 respectively
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A rose garden is formed by joining a rectangle and a semicircle, as shown below. The rectangle is 35 ft long and 28 ft wide.
Find the area of the garden. Use the value 3.14 for , and do not round your answer. Be sure to include the correct unit in your answer
Answer:
1287.72 [tex]ft^{2}[/tex]
Step-by-step explanation:
Area of the rectangle is length times width
a = (35)(28) = 980
Area of a circle is [tex]\pi r^{2}[/tex], but this is half of a circle so we will divide the answer by 2
a = [tex]\frac{3.14(14^{2}) }{2}[/tex] = [tex]\frac{3.14 x 196}{2}[/tex] =[tex]\frac{615.44}{2}[/tex] = 307.72
Add the half circle and the rectangle
980 + 307.72 = 1287.72
Frankie orders two hamburgers and a soda for lunch. A hamburger is $3 and a soda is $1.00. Write an expression to show how much he paid for lunch. Then find the value of the expression.
The value of the expression which shows the amount he paid for lunch is 7 dollars.
What is an expression?Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and divisions.
Given that Frankie orders two hamburgers and a soda for lunch. A hamburger is $3 and a soda is $1.00.
Now here is the expression-
1+(2x3)= 2 x 3 = $6
Cost of lunch = ($3 / hamburger) (2) + ($1 / soda) (1)
Cost of lunch = $6 + $1
Cost of Frankie's lunch = $7
Therefore, the value of the expression which shows the amount he paid for lunch is 7 dollars.
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A triangle has vertices at A(-2, 3), B(2, 1), and C(1, 0). After a transformation, the image of the triangle has vertices at A'(-2, -3), B' (2, -5), and C'(1, -6). Identify the transformation.
The transformation that is applied to the ΔABC to get the ΔA'B'C' is vertical translation by 6 units downwards.
The triangle has the vertices A(-2, 3), B(2, 1), and C(1, 0)
They are transformed such that:
A(-2, 3)→A'(-2,-3)
B(2, 1)→B'(2,-5)
A(-1, 0)→A'(-2,-6)
Now if we carefully observe we can see that the y-coordinate of A' is 6 less than that of A.
Similarly for B and C the coordinates are 6 units less than that of the object, but the x-coordinate remains the same.
This proves that the graph follows a vertical transformation and since the new ordinates are 6 units smaller, so the graph is translated 6 units downwards.
A function, f, that maps to itself is known as a transformation, or f: X→X'. The pre-image X will change into the picture X' following the transformation. This transformation can use any operation, or a combination of operations, including translation, rotation, reflection, and dilation.
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Consider a circle whose equation is x2 + y2 – 2x – 8 = 0. Which statements are true? Select three options. The radius of the circle is 3 units. The center of the circle lies on the x-axis. The center of the circle lies on the y-axis. The standard form of the equation is (x – 1)² + y² = 3. The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.
The true statements are:
The center of the circle lies on the x-axis
The radius of the circle is 3 units.
The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.
The standard equation of a circle is expressed as:
x²+y²+2gx+2fy+C=0
Centre is (-g, -f)
radius = √g²+f²-C
Given a circle whose equation is
x²+y²-2x-8=0
Get the centre of the circle
2gx = -2x
2g = -2
g = -1
Similarly, 2fy = 0
f = 0
Centre = (-(-1), 0) = (1, 0)
This shows that the center of the circle lies on the x-axis
r = radius = √g²+f²-C
radius = √1²+0²-(-8)
radius =√9 = 3 units
The radius of the circle is 3 units.
For the circle x² + y² = 9, the radius is expressed as:
r² = 9
r = 3 units
Hence the radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.
Hence we get the required answers.
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(b) 12 friends travel to the festival.
5 travel by car, 4 travel by bus and 3 travel by train.
Two people are chosen at random from the 12 friends.
Calculate the probability that they travel by different types of transport.
The probability that they two people are chosen and travel by different transport is 47/144
Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one. Probability predict how likely events are to happen. The meaning of probability is basically the extent to which something is likely to happen.
Probability is given as sample space / total outcome
Probability to travel by car p(C)= 5/12
Probability to travel by bus P(B)= 4/12=1/3
Probability to travel by train P(T)= 3/12= 1/4
for two people chosen at random
P(C ×B)= 5/12×1/3= 5/36
P(B×T)= 1/3×1/4= 1/12
P(C×T)= 1/4×5/12= 5/48
Therefore the probability that the two chosen travel by different car is
P(C ×B)+P(B×T)+P(C×T)= 5/36+1/12+5/48
= 141/432
divide through by 3
= 47/144
Hence the get the required answer.
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Can you solve these two problems please
Answer:
Step-by-step explanation:
Hi Debbie, the tricky part about these types of problem is recognizing that you know the total angle. 180° for the ABCD question and the angles are equal to each other for the TUWXY question , this tip lets you find X for each.
just add the two angle and set equal to 180 in each problem. I'll do the problems below, but , now that you know how, maybe you could try them and check your answer against mine.
The ABCD question
4x+7 + 2x -1 = 180
6x +6 = 180
6x = 174
x = 29
4(29)+7 = 123°
2(29)-1 = 57°
The TUWXY question
6x+13 = 10x-7
20 = 4x
5=x
then
6(5)+13 = 43°
and the next one should be the same
10(5) -7 =43°
check. so there are your answers. :) get it?
NO LINKS!! Describe the set of all points P(x, y) in a coordinate plane that satisfy the given condition
Answer:
a) A or first option,b) E or 5th option,c) E or 5th option.Step-by-step explanation:
a) x = - 8Simply check for x-coordinate of - 8, we see only the first option has it, all the others have x = 0 or x = 8 which is impossible to have on the line x = - 8.
It is parallel to the y-axis and x = - 8 for any value of y.
Correct choice is A or 1.
b) y = 8Similar to above, we exclude all the options with a different value of y other than 8.
There are two possible options left:
B or 2- incorrect as y = 0 is parallel to the x-axis, not perpendicular.E or 5 - correct optionc) x ≥ 0Consider line x = 0, this is overlapping with the y-axis.
x ≥ 0 gives us the y-axis (because of equal sign) and all the points to the right from it.
This is matching the description of option E or 5.
Answer:
(a) The line parallel to the y-axis that intersects the x-axis at (-8, 0).
(b) The line parallel to the x-axis that intersects the y-axis at (0, 8).
(c) The set of all points to the right of and on the y-axis.
Step-by-step explanation:
Part (a)
Given condition: x = -8
The equation of a vertical line is x = a.
This line is parallel to the y-axis (since it is vertical) and intersects the x-axis at (a, 0).
Therefore, the description that satisfies the given condition is:
The line parallel to the y-axis that intersects the x-axis at (-8, 0).Part (b)
Given condition: y = 8
The equation of a horizontal line is y = a.
This line is parallel to the x-axis (since it is horizontal) and intersects the y-axis at (0, a).
Therefore, the description that satisfies the given condition is:
The line parallel to the x-axis that intersects the y-axis at (0, 8).Part (c)
Given condition: x ≥ 0
The "≥" symbol means greater than or equal to.
x is greater than zero for all points to the right of the y-axis.
x is equal to zero for all points on the y-axis.
Therefore, the description that satisfies the given condition is:
The set of all points to the right of and on the y-axis.26. Use Patterns and Structure Luis is programming
an animation for a countdown timer where
points flash in sequence, one at a time, around
in a circle. He calculates that the coordinates of
the first four points in his sequence are (6, 0),
(5.5, 2.3), (4.2, 4.2), and (2.3, 5.5). He can find
the rest of the coordinates by rotating the first
four points by 90°, 180°, and 270°. What are
the coordinates of the points that complete the
sequence around in a circle?
Answer: ?????
Step-by-step explanation:
A ternary string is an ordered string of characters which consists of digits (0,1, or 2). For example, the ternary string 2122010 consists of exactly 2 zero's, 2 one's and 3 two's; another ternary string meeting these conditions is 0021221.
How many ternary strings are there with exactly 3 zero's, 5 one's and 3 two's?
39,916,800 ternary strings are there with exactly 3 zeros, 5 ones and 3 twos.
What is permutation?The term permutation refers to a mathematical calculation of the number of ways a particular set can be arranged.
Given that, A ternary string is an ordered string of characters which consists of digits (0,1, or 2). For example, the ternary string 2122010 consists of exactly 2 zeros, 2 ones and 3 twos
This is just the number of permutations of the set {0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2}. There are 11 elements in the set, so there are 11! = 39,916,880 possible ternary strings with exactly 3 zeros, 5 ones and 3 twos
Hence, 39,916,800 ternary strings are there with exactly 3 zeros, 5 ones and 3 twos.
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The population of a specific species of nocturnal mammal is decreasing at a rate of 3.5%/year. The graph models the number of mammals x years after they were originally counted.
Identify and interpret the key features of the exponential function modeled in terms of this situation.
Select each correct answer:
A. The y-intercept represents the number of mammals when they were originally counted.
B. The line y = 0 is an asymptote of the graph.
C. The y-intercept.is 75.
D. The y-intercept is 120.
E. The asymptote indicates that the number of mammals counted when the study began was 120.
F. The asymptote indicates that as years pass, the number of mammals will approach 0.
G. The line x = 0 is an asymptote of the graph.
The y-intercept (0, 120), and the point (55, 17), on the graph of the exponential function of the population of mammals with the population decreasing at 3.5% per year indicates;
A. The y-intercept represents the number of mammals when they were originally counted was 120
B. The line y = 0 is an asymptote of the graph
D. The y-intercept is 120
F. The asymptote indicates that as years pass, the number of mammals will approach 0
What is an asymptote of a graph?An asymptote is a line on a graph that the curve of a graph approaches as the values of the graph increases to infinity.
The points on the graph of the exponential function are;
(0, 120) and (55, 17)
The rate at which the population is decreasing = -3.5%
The output of the graph, y = The number of mammals x years after counting
The key features of the exponential function are;
The y-intercept of the graph is the point x = 0, which corresponds to year 0, or the time when the mammals were originally counted and the y-value at the y-intercept represents the number of mammals when they were counted originally, therefore option A is correct
The coordinates of the y-intercept is (0, 120)
The y-intercept is therefore the point y = 120
Therefore, option D is correct
The general form of the growth exponential function is presented as follows;
f(x) = a·bˣ + k
r = b - 1
b = 1 + r
Therefore;
b = 1 - 0.035 = 0.965
a = The first term = 120
Plugging in the known values from the graph, we get;
f(0) = 120 = a + k
120 = 120 + k
k = 120 - 120 = 0
k = 0 = The asymptote
Therefore, an asymptote is the line y = 0 option B is therefore correct
The number of mammals approach the asymptote, y = 0 as the number of mammals approach infinity
Therefore as the years pass the number of mammals will approach 0, option F is correct
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Find the circumference of the circle to the nearest tenth. Use 3.14 for it.
Answer:
Step-by-step explanation:
157m is the answer.
determaine each quotient 3/4 devided by 1/8
Answer:
6
Step-by-step explanation:
3/4 ÷ 1/8
= 3/4 . 8
= 24/4
= 6
An upcoming business has vowed to increase profits by 2% every year for the next decade. Initially the company started by making $100 million dollars. How much will they be making after 10 years? Keep your answer in millions rounded to a whole number.
The profit that the upcoming business would be making after 10 years is $122 million.
What is the profit in 10 years?The profit of the business in 10 years can be modelled with an exponential equation. This is because the rate of growth of profit each year would be 10% of the last year's profit.
The equation that is used to determine the profit in 10 years is:
FV = P (1 + r)^n
Where:
FV = Future value P = Present value R = interest rate N = number of yearsFV = 100 x (1 + 0.02)^10
FV = $100 million x (1.02^10) = $122 million
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which lines are parallel if m < 4 = m < 5? justify your answer
Answer:
Lines r and s are parallelStep-by-step explanation:
Angles 4 and 5 are congruent and are on the inner side of lines r and s, and opposite side from line l.
If two angles are on the inner sides of two lines and opposite sides of the line intersecting the two lines are equal, then these angles are alternate interior angles.
The two lines are parallel and the intersecting line is the transversal.
Lines r and s are parallel and line l is transversal.
Charles drew a plan for a rectangular piece of
material that he will use for a blanket. Three of the
vertices are (-1.4, -2.7), (-1.4,3.7), and (2.8,3.7).
What are the coordinates of the fourth vertex?
The fourth coordinate of rectangular piece of material is (2.8 , -2.7)
According to the question,
Charles drew a plan for a rectangular piece of material that he will use for a blanket. Three of the vertices are (-1.4, -2.7), (-1.4,3.7), and (2.8,3.7).
As we know , the opposite sides of rectangle are equal
If we locate these coordinates in our graph and join them
Length of rectangle will be = 2.8+1.4 = 4.2cm
Breadth of rectangle will be = 3.7 + 2.7 = 6.4cm
So, the fourth coordinate should lie 6.4cm far from (2.8,3.7)
Subtracting 6.4 from y-axis,
Fourth coordinate = 3.7 - 6.4
= -2.7
Therefore , The fourth side of rectangle = (2.8 , -2.7)
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Lamar buys candy that costs $5 per pound. He will buy at most 12 pounds of candy. What are the possible amounts he will spend on candy
Use C for the amount (in dollars) Lamar will spend on candy.
Write your answer as an inequality solved for C.
Answer:
He will spend $60 on candy
Step-by-step explanation:
If the cost for one pound is $5, then just multiply.
12 x $5 = $60
Answer: C=7
Step-by-step explanation: C=12+5
the answer is c=7
Which equations could you use to find the price of one tire patch? Select all that apply. 4x – 1.9 = 22.2 4x – 22.2 = 1.9 4x + 1.9 = 22.2 4x + 22.2 = –1.9 22.2 – 4x = 1.9
The linear equation that could be used to find the price of a tire patch is of:
4x + 1.9 = 22.2.22.2 - 4x = 1.9.What is a linear equation?The slope-intercept representation of a linear equation is shown by the rule presented as follows:
y = mx + b.
In the context of this problem, the meaning of the variables are given as follows:
Slope m: cost of a single tyre.Intercept b: Amount of Ryan's gift card.The values of these intercept is given as follows:
b = 22.2.
Hence the function is:
y = -mx + 22.2.
He bought four tires, hence x = 4, and had y = 1.9, hence the cost of a tire is found as follows:
-4m + 22.2 = 1.9.
Hence the options are:
4x + 1.9 = 22.2 -> first equation, considering the slope as x.22.2 - 4x = 1.9.Missing InformationThe problem is given by the image shown at the end of the answer.
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Pietro buys 20 candy bars for $6. He
plans to sell all 20 candy bars in 1 day, He
needs to make a profit of $9 per day to
meet his fundraising goal.
How much must he charge for each candy
bar?
Answer:
$0.45
Step-by-step explanation:
6 ÷ 20 = 0.3
Which means each candy bar costs $0.3.
9 ÷ 6 = 1.5
0.3 × 1.5 = 0.45
20 × 0.45 = 9
So he must charge $0.45 for each candy bar.
what is the difference 5 - 3.12
Answer: There is a difference of 1.88
Step-by-step explanation: Pls brainiest.
Answer:
1.88
Step-by-step explanation:
hopethishelpsya:)
Hi, would be really thankful for an answer
Considering the Central Limit Theorem, it is found that:
a)
The mean is the mean of the sample means.The standard deviation is [tex]\frac{\sigma}{7}[/tex], in which [tex]\sigma[/tex] is the population standard deviation.b) The shape of the distribution is approximately normal.
What is defined by the Central Limit Theorem?The Central Limit Theorem defines the distribution of the sampling distribution of sample means with size n of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex].
For the sampling distribution of sample means, the mean and the standard deviation are given as follows:
Mean: [tex]\mu[/tex], that is, the same as the population mean.Standard deviation: [tex]s = \frac{\sigma}{\sqrt{n}}[/tex], which is the population standard deviation divided by the square root of the sample size.For a skewed variable, the sampling distribution is also approximately normal, as long as n is at least 30.
In this problem, the sample size is greater than 30, hence the shape of the distribution is guaranteed to be approximately normal.
The standard deviation is given as follows:
[tex]s = \frac{\sigma}{\sqrt{49}} = \frac{\sigma}{7}[/tex]
As for the mean, it is the same as the mean of the sample means, you have to calculate all the sample means and then divide by 20.
Missing InformationThe problem is incomplete, hence the answer was given in general terms.
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Triangles F G H and J K L are shown. Angles G F H and K J L are congruent and angles F H G and J L K are congruent.
To show that ΔFGH ≅ ΔJKL by SAS, what additional information is needed? Check all that apply.
FH ≅ JL and FG ≅ JK
FH ≅ JL and HG ≅ LK
∠G ≅ ∠K and FH ≅ JL
∠G ≅ ∠K and GH ≅ KL
∠G ≅ ∠K and FG ≅ JK
Any of the following information can be used to show that ΔFGH is congruent to ΔJKL by SAS.
How to Show that Two Triangles are Congruent by SAS?The criteria for proving that two triangles are congruent to each other by the SAS congruence postulate are:
The two corresponding sides of both triangles must be congruent to each other.One pair of included corresponding angles in both triangles must also be congruent to each other.In the image given that shows triangle FGH and triangle JKL, we are given the following:
∠F ≅ ∠J and ∠H ≅ ∠L [two pairs of congruent angles]
No two congruent sides are marked in the triangles. Therefore, the additional information that may be needed to prove the triangles are congruent by SAS can be:
a. FH ≅ JL and FG ≅ JK
b. FH ≅ JL and HG ≅ LK
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a gymnast practices 6 days each week.She practices the same number of ours each day.If she practices 120 hours in a 4 week period how many hours each day does she practice?
Answer: She practices 5 hours a day
Step-by-step explanation: 6 days a week x 4 weeks = 24 days
120 hours of practice / 24 days = 5 hours of practice a day
Answer:
5hrs
Step-by-step explanation:
120 ÷ 4 = 30. 30 ÷ 6 = 5. She practices for 5hrs a week.
Solve for X
(9x+1)°
789
(17x - 3)
Type your answer...
The value of x in the given triangle is x = 4
Calculating the value of x in a triangleFrom the question, we are to determine the value of x.
From the given triangle,
We can write that
(9x+ 1)° + 78° + (17x - 3)° = 180° (Sum of angles in a triangle)
Now, we will solve for x
(9x+ 1)° + 78° + (17x - 3)° = 180°
9x° + 1° + 78° + 17x° - 3° = 180°
Collect like terms
9x° + 17x° = 180° - 1° + 3° - 78°
26x° = 104°
x = 104/26
x = 4
Hence, the value of x is 4
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For triangle XYZ, m∠X = (3g + 19)° and the exterior angle to ∠X measures (6g + 53)°. Find the measure of ∠X and its exterior angle
Check the picture below.
Estimate the product. 17 × 1.68
Answer:
34
Step-by-step explanation:
When estimating the product of an integer and a decimal, first round the decimal to its nearest whole number.
If the digit in the tenth place is less than 5, round down to the nearest whole number.If the digit in the tenth place is 5 or more, round up to the nearest whole number.Therefore,
1.68 ≈ 2So an estimate of the product is:
[tex]\implies 17 \times 1.68 \approx 17 \times 2[/tex]
Partition 17 into tens and units:
[tex]\implies17 \times 2= (10+7) \times 2[/tex]
Apply the distributive property of multiplication over addition:
[tex]\begin{aligned}\implies (10+7) \times 2&=(10 \times 2)+(7 \times 2)\\&=20+14\\&=34\end{aligned}[/tex]
Therefore:
[tex]\boxed{17 \times 1.68 \approx 34}[/tex]
Answer:
≈ 34
Step-by-step explanation:
The estimate value of 1.68,
→ 17 ≈ 17
→ 1.68 ≈ 2
Then the estimated product is,
→ 17 × 1.68
→ 17 × 2 = 34
Therefore, the product is 34.
Determine which answer in the solution set will make the equation true.
5f − 14 = 4f − 16
S: {−16, −2, 2, 4}
−16
−2
2
4