The mean can be written as mean A= x+ y/2
What is Mean?A data set's mean (average) is calculated by summing all of the numbers in the set, then dividing by the total number of values in the set.
Only numerical variables—regardless of whether they are discrete or continuous—can be used to determine the mean. Simply dividing the total number of values in a data set by the sum of all of the values yields it.
The mean formula is
= {Sum of Observation} ÷ {Total numbers of Observations}
Given:
mean A of two numbers, x and y
So, the mean can be written as
mean A= x+ y/2
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Acoording to the school survery, 20% of the students at rockwood junior high school speak spanish. There are 25 students at the school who speak spanish. How many students were surveyed?
The percentage is that indicating the hundredth total number of students surveyed such that 20% of them are 25 will be 125.
What is the percentage?
The percentage is defined as a given amount in every hundred. It is a fraction with 100 as the denominator percentage is represented by the one symbol %.
Let's suppose the total number of students that are surveyed was x.
It is known that x% of y is given as, (x/100)y.
Therefore,20% of x is (20/100)x = 0.2x
The 20% of the total students is 25.
So, 0.2x = 25
x = 25/0.2 = 125
Hence "The percentage is that indicating the hundredth total number of students surveyed such that 20% of them are 25 will be 125".
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A parking garage in the city charges $2.75 for the first hour and $1.25 for each additional hour, x. Write and solve an inequality to find the maximum time of additional hours that Tony can park his car at the garage if he wants to pay less than $8. and i have another question
.The inequality is given by:
[tex]2.75+1.25t<8[/tex]Subtract 2.75 from both sides of the inequality:
[tex]\begin{gathered} 2.75-2.75+1.25t\lt8-2.75 \\ 1.25t\lt5.25 \\ \text{ Divide both sides by }1.25 \\ \frac{1.25t}{1.25}\lt\frac{5.25}{1.25} \\ t\lt4.2 \end{gathered}[/tex]Therefore, the maximum time of additional hour is 4
Answer:
4 hours
Step-by-step explanation:
→ Write inequality
2.75 + 1.25x < 8
→ Minus 2.75 from both sides
1.25x < 5.25
→ Divide both sides by 1.25
x < 4
This is the exercise I have to do to practice for my GED I’m a six year old woman I’m trying to figure this out I know I have inserted in the formula and it says just like example 3 I will insert example 3 in the text hereA survey indicates that for each trip to a supermarket, a shopper spends an average of 43 minutes with a standard deviation of 12 minutes in the store. The lengths of time spent in the store are normally distributed and are represented by the variable X. A shopper enters the store. Find the probability that the shopper will be in the store for each interval of time listed below. a) Find the probability that the shopper will be in the store between 33 and 66 minutes.b)) Find the probability that the shopper will be in the store for more than 39 minutes. Hint: Convert the normal distribution X to Standard normal using Z formula Z=(X-μ)/σ and then look the Z-values from the table and then find the probability.Hint: Convert the normal distribution X to Standard normal using Z formula Z=(X-μ)/σ and then look the Z-values from the table and then find the probability.Please help me answer properly so I can start the exercise so I can be fish prayers for the GED practice course
Given:
The lengths of time spent in the store are normally distributed and are represented by the variable X
The survey indicates that for each trip to a supermarket, a shopper spends an average of 43 minutes with a standard deviation of 12 minutes in the store.
so, the mean = μ = 43
And the standard deviation = σ = 12 minutes
We will find the probability that supermarkets between 31 and 58 minutes
We will use the following formula to convert to the z-scores
[tex]Z=\frac{(X-μ)}{σ}[/tex]So, we will find Z when x = 31 and When x = 58
[tex]\begin{gathered} x=31\rightarrow z=\frac{31-43}{12}=\frac{-12}{12}=-1 \\ \\ x=58\rightarrow z=\frac{58-43}{12}=\frac{15}{12}=1.25 \end{gathered}[/tex]So, we will find the probability of P (-1 < z < 1.25)
From the tables of the z-score:
[tex]P(-1So, the answer will be 0.7357Find the value of the monomial.
-8m^4 n^4 for m = 0.5 and n =2
The value of the given monomial, -8[tex]m^{4}n^{4}[/tex], when m = 0.5 and n = 2 is -8.
According to the question,
We have the following monomial:
-8[tex]m^{4} n^{4}[/tex]
We have m = 0.5 and n = 2.
Now, putting these values of m and n in the monomial:
-8 [tex](0.5)^{4} (2)^{4}[/tex]
(Please note that when a power is there on a number then it means that to solve the expression we have to multiply the base as many times as the given power. For example, in this case, we will multiply 2 four times and the result will be 16. This concept is applicable to every expression we are solving whether the base is in decimal or in fraction or a integer.)
-8*0.0625*16
-128*0.0625
-8
Hence, the value of the given monomial is -8.
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PLEASE HELP I HAVE 3 MINUTES, THANK YOU!!
Answer:
-4 + -10
Step-by-step explanation:
Even with an addition sign, it still adds up to the same amount.
Hope this helps!
(Btw, if u get this right, pls do brainliest, I really need it! Thanks!)
Hakim drew a scale drawing of a neighborhood park. he used the scale 5 inches : 2 yards. a soccer field in the park is 130 inches wide in the drawing. how wide is the actual field?
Answer:
52 yards across
Step-by-step explanation:
Hakim drew a scale drawing of a neighborhood park. he used the scale 5 inches : 2 yards. a soccer field in the park is 130 inches wide in the drawing. how wide is the actual field?
130/5 = 26
26*2 = 52 yards across
Combinatorics is a branch of math focused on arrangements of objects. Jorge is an event organizer who must seat 102 guests. He has circular tables that seat 10 people each and square tables that seat 4 people each. He wants to use as many circular tables as possible but have no empty seats. Explain how he could arrange the tables he will need.
Explain how Jorge could arrange the tables he will need
To maximize the number of circular tables, he must thus employ 9 circular tables and 3 square tables.
What is Combinatorics?Combinatorics is a branch of math focused on the arrangements of objects.
Estimates of the number of operations needed by a computer algorithm can be created using combinatorial approaches.
It is given that the number of persons in each circular table and the square table will be 10 and 4 respectively.
We now need to determine the largest multiple of 10 in order to maximize the number of circular tables.
Now, if we take 100, there will only be 2 seats left. However, 4 people are needed for square tables. Therefore, 100 is incorrect.
The circular tables utilized would be if we choose 90 as a multiple of 10 is,
= 90 / 9
= 10
Number of guests left,
=102 - 90
= 12
12 is a multiple of 4 as a result 3 square tables may therefore fit 12 people,
=4 × 3
=12
Thus, to maximize the number of circular tables, he must thus employ 9 circular tables and 3 square tables.
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the difference of the product of 4 times a number and 2/3 is 34 / 3
Answer: x=3
Step-by-step explanation:
[tex]\displaystyle\\4x-\frac{2}{3}=\frac{34}{3}\\[/tex]
Multiply both parts of the equation by 3:
[tex]4x(3)-2=34\\12x-2=34\\12x-2+2=34+2\\12x=36[/tex]
Divide both parts of the equation by 12:
[tex]x=3[/tex]
The unknown number from the equation is 3.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
Given that, the difference of the product of 4 times a number and 2/3 is 34/3.
Let the unknown number be x.
4x-2/3 =34/3
(12x-2)/3=34/3
12x-2=34
12x=36
x=3
Therefore, the unknown number is 3.
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Juanita used the steps shown below to correctly solve an equation. A step is missing.
-3(c-6) + 4c = 5(2c + 9)
?
c+ 18 = 10c +45
c-27 = 10 c
-27= 9c
-3 = c
O-3c-6 + 4c = 10c + 9; associative property of addition
O-3c+ 18+ 4c = 10c + 45; associative property of addition
O-3c-6 + 4c = 10c + 9; distributive property
O-3c + 18+ 4c = 10c +45; distributive property
Answer: Option (D) property of distribution
Step-by-step explanation:
got it right on test
2) Are the triangles similar? If so, what is the scale factor which converts ARPQ to AVAQ?
A)NO
B)YES;1/2
C)YES;2/3
D)YES;2/1
1/2 is the factor which converts right angled triangles ΔRPQ to ΔVAQ
What is a Triangle?Triangle: A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted triangle ABC. In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane
Both the triangles are right angled triangles at ΔVAQ and ΔRPQ
side AV=3 units and AQ=4 units
side RP=6 units and PQ=8 units
AV is half of RP and AQ is half of PQ
AV=1/2(RP) and AQ=1/2(PQ)
1/2 factor converts ΔRPQ to ΔVAQ
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Help please !! due at 8pm tonight
Answer:
y=-3x+7
Step-by-step explanation:
:]
Answer:
Y=-3x+7
Step-by-step explanation:
Use rise/run
Let f(x) = (6x³ - 7)³ and g(x) = 6x³ - 7.
Given that f(x) = (h° g)(x), find h(x).
0080
Clear all
Enter the correct answer.
+?
DONE
When the result of one function is utilized as the input for another, this is known as a composite function. If f(x) = (6x³ - 7)³ and g(x) = 6x³ - 7 then the value of h(x) = x³.
What is meant by composition functions?A function is composed in mathematics when two functions, f and g, are used to create a new function, h, such that h(x) = g(f(x)). The function of g is being applied to the function of x, in this case. Therefore, a function exists essentially applied to the output of another function.
Function composition is an operation used in mathematics that takes two functions, f and g, and creates a function, h = g ° f, such that h(x) = g. The function g is applied in this operation on the outcome of applying the function f to x.
Let the two functions be f(x) = (6x³ - 7)³ and g(x) = 6x³ - 7.
f(x) = (h° g)(x)
⇒ f(x) = (h(g(x))
If f(x) = (h° g)(x) (6x³ - 7)³ = (h(g(x)) then h(x) = x³.
The complete question is:
Let f(x) = (6x³ - 7)³ and g(x) = 6x³ - 7. Given that f(x) = (h° g)(x), find h(x).
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Answer:
h(x) = x³
Step-by-step explanation:
Given:
[tex]f(x)=(6x^3-7)^3[/tex]
[tex]g(x)=6x^3-7[/tex]
[tex]f(x)=(h \circ g)(x)[/tex]
The relationship between f(x) and g(x) is that function f is function g cubed:
[tex]f(x)=(g(x))^3[/tex]
(h o g)(x) means we replace the x-variable of function h(x) with function g(x). So:
[tex](h \circ g)(x)=h(g(x))[/tex]
If (h o g)(x) equals f(x), then h(x) must be h(x) = x³.
Check by replacing the x-variable of function h(x) with the function g(x) and comparing it to f(x):
[tex]\begin{aligned}(h \circ g)(x)&=h(g(x))\\&=(g(x))^3\\&=(6x^3-7)^3\\&=f(x)\end{aligned}[/tex]
Hence proving that h(x) = x³.
Solve the system of equations.
Answer:
b
Step-by-step explanation:
because you need ti 2x +
Do number 6 please thank you!
The graph below shows the solution to which system of inequalities?
A.y > –3 and y ≤ –x
B.y ≥ –3 and y ≤ –x
C.x ≥ –3 and y > –x
D.x > –3 and y ≥ –x
The correct option is A, the system of inequalities is:
y > -3y ≤ –xWhich is the system of inequalities graphed?On the graph, we can see two lines.
One is a dashed line (so we need to use the symbols > or < ) and it is horizontal, such that the line is:
y = -3
And the shaded region is above that line, so the inequality is:
y > -3.
The other inequality is below a line y = -x, and we can see that the line is solid (so we use the symbols ≤ or ≥).
Then here the inequality is.
y ≤ -x
Then the system of inequalities is:
y > -3.
y ≤ -x
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What is the answer to this eqaution 7.68+3.18÷12
can someone please help solve this math problem with solution? thank u!
===================================================
Work Shown:
[tex]\frac{n^2+n-6}{n-2}\\\\\frac{(n+3)(n-2)}{n-2}\\\\n+3[/tex]
---------------
Explanation:
Often when simplifying, it's a good idea to factor and see what cancels (if anything does cancel).
To factor the numerator, think of two numbers that
multiply to -6add to 1Through trial and error, you should find the two numbers to be 3 and -2
3 times -2 = -63 plus -2 = 1So that's how [tex]n^2+n-6[/tex] factors to [tex](n+3)(n-2)[/tex].
After this point, the (n-2) terms cancel leaving n+3 behind
We can say [tex]\frac{n^2+n-6}{n-2}=n+3 \ \ \text{when } n \ne 2[/tex]
The [tex]n \ne 2[/tex] is to avoid a division by zero error.
you are choosing between two different cell phone plans. the first plan charges a rate of 23 cents per minute. the second plan charges a monthly fee of $34.95 plus 10 cents per minute.
You will need to use at least 267 minutes in a month in order for the second plan to be preferable.
Given the following:
First plan=23 cent per minute
Second plan=$34.95 plus 10 cents per minute
Calculate the number of mins to use in a month to make second plan preferable:
We first change $34.95 to cents:
1 usd=100 cents
$34.95=($34.95*100 cents)/$1
=3495 cents
Second plan will now be 3495 plus 10 cents per minute
Now, calculate the number of mins to use:
Let x represents the number of mins, now 23 cent per minute will be:
23(x)>3495 plus 10 cents per minute
23x>3495+10x
23x-10x>3495
13x=3495
x=3495/13
x>268.85 mins
Therefore, one will need to use at least 267 minutes in a month in order for the second plan to be preferable.
The question is incomplete, complete question is given below:
You are choosing between two different cell phone plans. The first plan charges a rate of 23 cents per minute. The second plan charges a monthly fee of $34.95 plus 10 cents per minute. How many minutes would you have to use in a month in order for the second plan to be preferable?
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A small business that makes candles uses a proportional amount of essential oil and wax. For 208 ounces of wax, they use 8 ounces of essential oil.
How many ounces of essential oil is needed for 728 ounces of wax?
12.5 ounces
28 ounces
42 ounces
91 ounces
Answer:
B, 28.
Step-by-step explanation:
728 divided by 208, which is 3.5. then you multiply 3.5 & 8 to get 28.
The answer above me has the answer.
Step-by-step explanation: He is 101% confident its it and I back it up because got it right (he should've been 102% confident tho)
Help it was due yesterday
Answer:
10
Step-by-step explanation:
486-466 = 20
1/2 x 20 = 10
:]
Answer:
an expression that equals 10
Step-by-step explanation:
486 - 466 = 20
1/2 of 20 is 10
You don't list choices.
You need an expression that equals 10.
What is 4/5 the sum of w and z given that w = 12 and z = 43
[tex] \frac{4}{5} (w + z) \\ = \frac{4}{5} (12 + 43) \\ = \frac{4}{5} (55) \\ = 4(11) \\ = 44[/tex]
ATTACHED IS THE SOLUTION
Kim buys 6 pounds of apples.
What is the weight of the apples in kilograms?
Round to the nearest tenth, if necessary.
Answer: 2.7 kg
1 kilogram (kg) = 2.204623 pounds (lb)
[tex]\frac{6 lb}{1}[/tex] × [tex]\frac{1 kg }{2.204623 lb}[/tex] = 2.721553753 kg
You place 1 kg over 2.204623 lb since they are equal. In the above equation, the pounds (lb) cancel out since one is in the numerator (the number on top of the fraction) and one is in the denominator (the number on the bottom of the fraction). You multiply 6 by the 1 in the numerator and multiply the 1 in the denominator by 2.204623. This turns the equation into:
[tex]\frac{6 kg}{2.204623}[/tex] =2.721553753 kg
You divide 6 by 2.204623 to get 2.721553753
To round to the tenths place, you include only the first number to the right of the decimal, which is 7. Since the number to the right of the 7 is less than five, it stays 7. If it were five or bigger, 7 would turn into 8.
The answer: 2.7 kg
The amount Abigail Frump makes, in dollars, working h hours can be represented by the expression 18h + 8. Abigail hopes to get a raise that
can be represented by the expression 2h + 32. Write an expression that represents how much Abigail will make working h hours if he gets the
raise. How much will he make for working 6 hours?
compare 7.3 and 12 use <,>, or =.
Answer: 7.3 < 12
Step-by-step explanation:
Charmaine has b decks of cards. Each deck has 52 cards in it. Using b, write an expression for the total number of cards Charmaine has
Answer:
Step-by-step explanation:
52 + b = 52b or 52(b = 52b ( means x
A store owner mixes 2 lb of candy that cost x dollars per pound with 3 lb of candy that costs $1.50 per pound. She sells the mix for $2.50 per pound.
1. How much did the 2 lb of the first type of candy cost the owner?
2. How much did the 3 lb of the second type of candy cost the owner?
3. How much did the two types of candy cost the store owner in total?
4. How much money will the store owner get if she sells all of the new mixture?
5. Write an equation to find the cost per pound of the first candy
6. Solve the equation to find the owners cost of the first candy per pound
Answer:
1. How much did the 2 lb of the first type of candy cost the owner?
2x
2. How much did the 3 lb of the second type of candy cost the owner?
3*1.5 = 4.5
3. How much did the two types of candy cost the store owner in total?
2x + 4.5
4. How much money will the store owner get if she sells all of the new mixture?
(2 + 3)*2.5 = 12.5
5. Write an equation to find the cost per pound of the first candy
2x + 4.5 = 12.5
6. Solve the equation to find the owners cost of the first candy per pound
2x + 4.5 = 12.5
2x = 8
x = 4
a^-1 = ?
A. -a
B.√ a
C. 1/a
Answer: C
Step-by-step explanation:
This is the definition of a negative exponent.
Using a map, Sasha measures the distance between the city in which she lives and her vacation destination to be 450 miles. She assumes that she may be off by 30 miles in her estimation.
What equation can Sasha use to determine the minimum and maximum distance her city is from her vacation destination?
Drag numbers or symbols to the boxes to correctly complete the equation.
The equation that Sasha can use to determine the minimum and maximum distance her city is from her vacation destination is 450 + 30 and 450 - 30.
What is an equation?It should be noted that an equation is simply used to illustrate the relationship between the variables that are illustrated or given in the data.
It should be noted that for the minimum distance, she has to subtract 30 miles from the vacation destination.
The minimum value will be:
= 450 - 30
= 420. miles.
For the maximum distance, she has to add 30 miles from the vacation destination.
The maximum distance will be:
= 450 + 30
= 480 miles.
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The area of a bulletin board is 55 square feet. The length is
four feet more than three times the width. Find the length
and width of the bulletin board.
Step-by-step explanation:
it is a rectangle.
the area is a rectangle is
length × width
in our case
length × width = 55 ft²
length = 3×width + 4
we use that in the first equation :
(3×width + 4)×width = 55
3×width² + 4×width - 55 = 0
the general solution to a quadratic equation like
ax² + bx + c = 0
is
x = (-b ± sqrt(b² - 4ac))/(2a)
so,
width = (-4 ± sqrt(4² - 4×3×-55))/(2×3) =
= (-4 ± sqrt(16 + 660))/6 = (-4 ± sqrt(676))/6 =
= (-4 ± 26))/6
width1 = (-4 + 26)/6 = 22/6 = 11/3 = 3 2/3 ft
width2 = (-4 - 26)/6 = -30/6 = -5
negative numbers for the size of a physical object don't make sense, so
11/3 = 3 2/3 ft is our solution.
length = 3×width + 4 = 3×11/3 + 4 = 11 + 4 = 15 ft
so,
the length = 15 ft
the width = 3 2/3 ft (or 11/3 ft)
Select the correct answer. dudley is biking. he wants to cover 40 miles. if he travels 30 miles every 2 hours, what is the equation of a line that models y, the number of miles he has left to travel, after biking x hours? a. y = -15x â€" 40 b. y = -30x 40 c. y = -15x 40 d. y = 30x â€" 40
The equation will be y = -15x + 40
Equations help us to understand a particular problem better, they give us possible insights into the situation. Equation Formation is an important aspect of Mathematics. We can form equations on the basis of the information given and then analyze it.
Given:
The biker, Dudley wants to travel 40 miles.
It is given that he travels 30 miles every 2 hours.
Obtaining Equation,
Distance traveled in 2 hours = 30 miles
Then, distance traveled in x hours = [tex]\frac{30}{2}*x = 15x[/tex]
So, the remaining distance to cover = 40 - 15x
or y = 15x - 40
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