Natasha and Richard are marking exam papers. Each set takes Natasha 45 minutes and Richard 1 hour. Express the times Natasha and Richard take as a ratio.
Give your answer in its simplest form.
Answer:
3:4
Step-by-step explanation:
for every set that Natasha and Richard do and since 1 hour is 60 minutes the ratio is 45:60 and then you divide both sides by 15 to get 3:4
List square numbers 50 to 80
What type of number gets a mathematician in trouble the most when trying to use
a function to model' a real world situation? Why?
Your answer
The type of number that gets a mathematician in trouble the most when trying to use a function to model a real-world situation are irrational numbers and zero.
What type of number gets a mathematician in trouble and why?Possibly a negative relationship. When x gets close to 0, which happens rather frequently, the problem starts to become a problem.y = k/x, where k is a fixed number, say 10.
The most difficult number, in my opinion, is zero. The notion of 0 was formed roughly 1100 years after the death of Christ. The value "0" had no meaning to the Romans. For them, there was nothing resembling a zero in the year 2019. They would write it as (MMXIX). When giving parts of an inch in their engineering drawings, that must be very awkward.The irrational would be the second group that probably poses some difficulties. sqrt(3) for one, pi for another. That took time to come into being as well.To learn more about numbers visit:
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1. AGES Mel is 3 years older than Rahfat
and Aurelio is twice as old as Mel. The
sum of their ages is 57. How old
is Mel?
Answer:
15
Step-by-step explanation:
Mel's Age = x
Rahfat's Age = x-3
Aurelio's Age = 2x
2x + x +x -3 = 57
4x -3 = 57
4x = 60
x = 15
A bird flies from the bottom of a canyon that is 59 1/5 feet below sea level to a nest that is 620 3/5 feet above sea level. What is the difference in elevation between the bottom of the canyon and the bird's nest?
The difference between the elevation of the canyon and the bird's nest is ___ feet. (Simplify your answer. Type an integer, proper fraction, or mixed number.)
The difference in elevation between the bottom of the canyon and the birds nest is 679.8 feet.
What is a numerical expression ?
A numerical expression is an statement written in form of numbers with mathematical operations.
According to the given question
A bird flies from the bottom of a canyon that is59 1/5 feet below sea level to a nest that is 620 3/5 feet above sea level.
59 1/5 feet
(59×5 + 1)/5
59.2 feet
Let assume that the sea level is at 0 feet.
= (620×5 + 3)/5
= 620.6 feet.
From the given data we write an expression which is the difference in elevation between the bottom of the canyon and the bird nest is
( 620.6 ) - ( -59.2 ) feet
= 620.6 + 59.2 feet
= 679.8 feet.
Hence, The elevation difference between the birds' nest and the canyon's base is 679.8 feet.
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For each pair of images, describe which of these transformations are translation, reflection, or rotation.
Answer:
A is translation because it's being moved to the right to get a'b'
b is reflection because you would reflect over the x-axis \
C is rotation
Picture A represents the translation, the picture represents the reflection, and picture C represents the rotation.
What is geometric transformation?It is defined as the change in coordinates and the shape of the geometrical body. It is also referred to as a two-dimensional transformation. In the geometric transformation, changes in the geometry can be possible by rotation, translation, reflection, and glide translation.
It is given that:
The lines are shown in the picture.
As we know from the definition of the geometric transformation, geometric transformation, changes in the geometry can be possible by rotation, translation, reflection, and glide translation.
From the picture,
Picture A, which is being moved to the right to obtain A'B', serves as a representation of the translation.
Because you would reflect over the x-axis, Picture A represents reflection.
Image A illustrates rotation.
Thus, picture A represents the translation, the picture represents the reflection, and picture C represents the rotation.
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For the four-digit number: 3040, what
must the value of the be so that
this four-digit number is divisible by
5?
The value which the four digit number is divisible by 5 is 608
What is Divisibility?
By looking at the digits of an integer, a divisibility rule can be used to quickly and conveniently determine if it can be divided by a specific number.
The given four-digit number is divisible by 5:
3040
To find the value from which the four digit number is divisible by 5
3040 ÷ 5
= 3040/5
= 608
Hence, The value of the be so that this four-digit number is divisible by 5 is 608
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I need help on this asap due Tuesday pls help
a) To calculate the overall mean, you must take the total wages divided by the total number of workers. What Stacy is doing is calculating the average of the means, which is incorrect as both the total wages and the quantity of workers are both different (or she's just using the wrong method of calculation)
b) First, we find the total wages of the 56 workers : 42 x 9.5 + 14 x 13.5 = 588 (pounds)
So, the overall mean is : 588 : 56 = 10.5 (pounds/h)
Answer:
£ 10.50
Step-by-step explanation:
Mean:a) Stacy is wrong because she found the mean of the £9.50 and £13.50. She has to find the mean of wage of 42 packers and wage of 14 truck drivers.
[tex]\sf b) Overall \ mean \ wage = \dfrac{sum \ of \ wages \ of \ 42 \ packers+ Sum \ of \ wages \ of \ 14 \ truckers}{number \ of \ packers + numbers \ of \ truck \ drivers}[/tex]
Sum of wages of 42 packers = 42 * 9.50
= £ 399
Sum of wages of 14 truck drivers = 14 * 13.50
= £ 189
[tex]\sf Overall \ mean \ wage = \dfrac{399+189}{42+14}\\\\[/tex]
[tex]\sf = \dfrac{588}{56}\\\\[/tex]
= £ 10.50
Find the total cost of a $40 meal with a 10% tip. Round to the nearest cent when necessary
We know that the cost of the meal is $40 and the tip is the 10%.
And we must find the total cost.
The total cost will be we cost of the meal plus the tip.
Now, we must find the cost of the tip.
Since the tip is the 10% we must multiply the cost of the meal by 10%. (We can represent 10% as 0.1)
[tex]\text{tip}=\text{ \$40}\cdot0.1=\text{ \$4}[/tex]Then, the total cost is
[tex]\begin{gathered} \text{ Total cost=cost of the meal + tip} \\ \text{ Total cost= \$40+ \$4 = \$44} \end{gathered}[/tex]Finally, the total cost of the meal is $44.
the coefficient correlation for rent and square footage is computed to be 0.84, this means the relationship between the two variables are blank
Based on the correlation coefficient between rent and square footage of 0.84, the relationship between the two variables is Strong and Positive.
How to describe the correlation coefficient?The Correlation Coefficient can be negative, positive, or 0. When it is 0, then no relationship exists between the variables. A negative coefficient means that the relationship is negative.
A positive correlation means that the relationship is positive which means the variables increase (decrease) together. A correlation coefficient above 0.8 indicates that the correlation is strong.
In this case, it means that the correlation of 0.84 between rent and square footage is strong and positive.
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find elapsed time 7:30am to 3:00 pm
Answer:
7 hours 30 minutes and 0 Seconds
Step-by-step explanation:
60 minutes in 1 hour7:30 - 3:0060 * 10 = 600 SecondsPlus the 30 minutes which converts to 20 secondsChange that into hours and minutesHelp me Im having trouble anyone help me
Answer:
y=x+4
Step-by-step explanation:
The slope of the line is [tex]\frac{3-4}{-1-0}=1[/tex].
Since the y-intercept is 4, the equation is y=x+4.
geometry is this correct guys?
Answer: bigger angle=64 smaller angle=26
Step-by-step explanation:
1. set up an equation
because the bigger angle is 14 less than 3 times the measurement of the smaller angle we can call the smaller angle x and the bigger angle 3x-14 knowing complementary angles are 90 degrees you can set up the following:x+3x-14=90
3.solve the equation
x+3x-14=90
4x-14=90 | combine like terms
4x=104 | add 14 on both sides
x=26 | divide by 4 on both sides
4. plug x in to your angle measures
1(26)=26
3(26)-14
78-14
64
Which of the following is a polynomial?
(a) 2−6√+2 (b) 52−3+1
(c)√+1√ (d) None of these
The true statement about the expressions is (d) None of these
What are polynomial expressions?Polynomial expressions are mathematical statements that are represented by variables, coefficients and operators
How to determine the polynomial expression?From the list of options, the given parameters are
(a) 2 − √6 + 2 (b) 52 − 3 + 1 (c)√1
For an expression to be a polynomial, the expression must have variables, coefficients and operators
None of the given expressions have variables, coefficients and operators.
This means that the expressions are not polynomial
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The graph shows how many cups of water are needed for each cup of flour in a pizza dough recipe. In this activity, you will find the slope of the line shown in the graph.
To calculate slope, you need two points. Choose two points on the line.
The slope of the line shown in this graph is equal to 3/5 or 0.6
What is a pitch?A pitch is also referred to as slope and it can be defined as the ratio of the vertical distance (rise) measured to the horizontal distance (run) measured.
How to determine the pitch (slope) of a roof?Mathematically, the pitch (slope) of a geometric figure or line can be calculated by using this formula:
Pitch (slope) = V/H
Where:
V represents the rising vertical distance of an object.H represents the horizontal distance an object runs through.Based on the given graph, we would select the following points:
Rise = 6, 0
Run = 10, 0
Substituting the selected points into the formula, we have;
Pitch (slope) = (6 - 0)/(10 - 0)
Pitch (slope) = 6/10
Pitch (slope) = 3/5 or 0.6
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Complete Question:
The graph shows how many cups of water are needed for each cup of flour in a pizza dough recipe. In this activity, you will find the slope of the line shown in the graph.
To calculate slope, you need to know the rise and the run of the graph. Use the graph to find the rise and the run from one point you selected to the other.
Answer: Part A
Answers will vary. The sample answers throughout this Lesson Activity assume the points chosen are (0, 0) and (5, 3).
Part B (Answer)
Between the points (0, 0) and (5, 3), there is a rise of 3 units and a run of 5 units.
Part C ( Answer)
Between the points (0, 0) and (5, 3), the rise is 3 and the run is 5. The slope is the ratio of rise to run. Therefore, the slope of the line is 3/5.
Step-by-step explanation:
Questions
Part A - To calculate slope, you need two points. Choose two points on the line.
Part B - To calculate slope, you need to know the rise and the run of the graph. Use the graph to find the rise and the run from one point you selected to the other.
Part C
Using the rise and run from part B, what is the slope of the line?
Several years ago, Melissa bought some gold at a price of $1,430 per ounce. When she
went to sell it, the gold was worth 30% more than it was when she purchased it. What
was the new value of the gold?
The new value of gold was $1859 per ounce.
How to calculate profit amount?
Finding profit is simple using this formula: Total Revenue - Total Expenses = Profit.
Price in which Melissa bought gold per ounce = $1,430
Given that, Melissa sell it when the gold price is 30% more than when she purchased it.
Price in which Melissa sell gold per ounce = $ 1,430 + 1,430×30%
= $ 1,430 + 1,430×[tex]\frac{30}{100}[/tex]
= $ 1,430 + 429
= $ 1,859
Hence, the new value of gold was $1859 per ounce.
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Graph each equation after plotting at least three points for each one
1) y=-x+10
2) y=-1/2x+4
Answer:
[(2, 8),(3, 7),(4, 6)]
Graph the equation like normal.
Use the procedures explained below to answer the next question.
Step-by-step explanation:
To obtain 3 points, choose any values for x and substitute into the equation for corresponding values of y. To make this easier, I'm going to use function notation instead. But, this works the same using slope-intercept form.
[tex]f(x)=-x+10\\f(2)=-2+10=8 \rightarrow (2,8)\\f(3)=-3+10=7 \rightarrow (3,7)\\f(4)=-4+10=6\rightarrow(4,6)[/tex]
All I did was substitute three different values of x, to get the corresponding values for y.
So, the three points that are on the line are (2, 8), (3, 7), and (4, 6). Now, you can graph the equation as you normally would.
As shown in the attached screenshot, the three points that we found are correctly on the graphed line.
Use the same procedures to answer the next question.
Write 4.1012 in words. A four and ten twelve ten thousandths B four and one thousand twelve ten thousandths C four and one thousandths twelve ten thousandths D four point one zero one two
Writing 4.1012 in words will be represented as D. four point one zero one two.
How to illustrate the information?It should be noted that writing in words simply means spelling or calling out of the numbers that are given.
Based on the information, it should be noted that (.) is illustrated as a point when calling out the decimal numbers. Other values include:
4 = four
1 = one
0 = zero
2 = two
Therefore, based on the illustration, the correct option is D.
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Answer:
B
Step-by-step explanation:
he's wrong
PLEASE SOMEONE NEED TO ANSWER. IM GONNA FAILED MY CLASS IN GEOMETRY
In Exercises 3 and 4, plot the points in a coordinate plane. Then determine whether
AB and CD are congruent.
3. A(-7, 1), B(-4, 1), C(3, -5), D(3, -2)
4. A(1, -1), B(1, 1), C(3, -4), D(5,-4)
Circuitville has been selling an average of 22 Intelliphones per day. On August 31 they have an inventory of 110 Intelliphones. Write a linear function modeling the daily inventory. Then use the model to predict the date the store will have to restock if they want to have at least 25 phones in stock at all times.
The linear function modelling the daily inventory in t days after August 31 is given by:
I(t) = 110 - 22t.
Using the given function, they must restock the store on September 3.
What is a linear function in slope-intercept format?A linear function, in slope-intercept format, is modeled according to the following rule:
y = mx + b
In which:
The coefficient m is the slope of the function, which is the rate of change of the function, that is, the change in y divided by the change in x.The coefficient b is the y-intercept of the function, which is the the value of y when the function crosses the x-axis(x = 0).In the context of this problem, we have that:
The intercept is of b = 110, as on the reference day, which is of August 31, they have 110 Intelliphones.The slope is of m = -22, as on each day they sell 22 phones, meaning that the amount decays by 22.Thus the model is given as follows:
I(t) = 110 - 22t.
They must have at least 25 phones in stock at all times, hence:
I(t) >= 25
110 - 22t >= 25
22t <= 85
t <= 85/22
t <= 3.86.
Rounding down, as after 4 days they would have less than 25 phones, they must restock the store on September 3, which is 3 days after August 31.
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a phone company charges a base fee of $12 per month plus an additional charge per minute. The monthly phone cost C can be represented by this equation:C=12+am, where A is the additional charge per minute and M is the number of minutes used what does M equal in an equation.
m in the linear equation that represents the scenario is expressed as: m = (C - 12)/a.
How to Interpret a Linear Equation?A linear equation, in slope-intercept form y = mx + b or y = b + mx, can be used to model a scenario where:
m = slope or unit rate or average rate b = the starting value or initial value or y-intercept.In the scenario described above, given that C = 12 + am represents the equation of the monthly pone cost, we have the following:
Monthly phone cost (y) = C
Additional charge per minute (m) = a
Number of minutes (x) = m
Base fee (b) = 12
Thus, to find what m equal in the equation, make m the subject fo the formula:
C = 12 + am
C - 12 = 12 + am - 12
C - 12 = am
(C - 12)/a = m
m = (C - 12)/a
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"I NEED HELP PLS" The following figure is made of 1 triangle and 2 rectangles.
Find the area of each part of the figure and the whole figure.
Figure Area (square units)
Rectangle A
Triangle B
Rectangle C
Whole figure
Answer:
Step-by-step explanation:
0.4% as a decimal
ITS DUE AT MIDNIGHT
Answer: 0.004
Step-by-step explanation:
If two charged objects have a 125 N force between them when they are 3.00 m apart, what force exists between them when they are 15.0 m apart? help
Answer:
I think its 5.00 N
Step-by-step explanation:
A family arrives at walt disney world parking lot. to get from their car in the parking lot to the gate at the magic kingdom they walk 1/4 mile take a tram for 1/3 their total distance and take a monorail for 1/2of their total distance how far is it from their car to the gate to magic kingdom
The distance from the car to the gate to magic kingdom is 1 1/12 miles.
How to calculate the distance?From the information given, it was stated that get from their car in the parking lot to the gate at the magic kingdom they walk 1/4 mile take a tram for 1/3 their total distance and take a monorail for 1/2.
Therefore, the distance from the car to the gate to magic kingdom based on the information will be the addition of the fractions given. This will be:
= 1/3 + 1/2 + 1/4
= 4/12 + 6/12 + 3/12
= 13/12
= 1 1/12
The distance is 1 1/12 miles.
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A. All real numbers are in the range of this function.
B. The domain for this function is all real numbers.
C. The domain for this function is the set (-5).
D. This graph is not a function because the value of y is the same for
every value of x.
E. The range for this function is the set {-5).
Answer:
Step-by-step explanation:
whoops, does anyone know how to delete an answer?
Determine the value of k that would complete the equation.
x y
2 -12
3 -8
6 -4
The value of "k" in the following equation 72 + k = 54 for which the given linear equation is true is k = -18
As per the question statement, we are supposed to find the value of "k" in the following equation 72 + k = 54 for which the given linear equation is true.
The solution is given below:
72 + k = 54, subtracting 72 from both sides
k = 54 - 72
k = -18
Therefore the value of "k" in the following equation 72 + k = 54 for which the given linear equation is true is k = -18
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10^-3 x 10^6
give answer in powers (for example, 10^-9 or 10^18)
Can someone help please??
Find the probability of pulling a red card out of a standard deck of cards
Answer:
Find the probability of pulling a red card out of a standard deck of cards
Step-by-step explanation:
So, the probability of drawing a red-faced card is 6 out of 52 cards. Thus, the probability of drawing a red face card from a deck of cards is 6/52 = 3/26.
A standard deck of playing card consists 52 cards.
Cards is splitted into 4 suit i.e. Hearts, Spades, Diamond and Clubs.
Each suits consists of 13 cards - the Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, King and Queen.
Hearts & Diamond are red cards and Spades and Clubs are black cards.
Probably = Number of favourable/Possible outcomes/ Total outcomes.
Probability of pulling a red card = 26/ 52 = 0.5
Thus, probability of pulling a red card is 0.5.
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