the ratio of the number of girls to all students in the class is 4:9 can there be 20 students in that class?
I need help asap my sister isn't here so i can't ask her for help
Answers
Answer:
nooo.......how there can only be 20 students.....!
The answer is no!
There can't be 20 students in that class because the ratio is 4:9 so its either 4 boys and 9 girls or 4 girls and 9 boys.This is a total of 13 students because (4+9=13).The answer is That there can not be 20 students in that class because there is only 13 students.
Related Questions
Which statements about the system are true? Select two options.
y=-x-4
3y-x = -7
The system has one solution.
The system consists of parallel lines.
Both lines have the same slope.
Both lines have the same y-intercept.
The equations represent the same line.
Answers
The slope for both the line is m= 1/3 and they are parallel lines , Option B and C are correct two options
The first equation is
y = (1/3)x-4 and not y = -x-4
(if the equation is not corrected then it will not have two true statements)
What is a System of Equation ?A system of equation is a set of equation which have a common solution
The given system of equation is
y = (1/3)x-4
3y -x = -7
3y = x-7
As it can seen from the standard equation of a line that
y =mx+c
so slope for both the line is m= 1/3
Therefore they are parallel lines
Thus , Option B and C are correct two options
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PLEASE HELP. I WILL GIVE YOU BRAINLIEST. NO LINKS What is the measure of n?
28
n
m
7
n
=
[?]
Enter
![PLEASE HELP. I WILL GIVE YOU BRAINLIEST. NO LINKS What is the measure of n?28nm7n=[?]Enter](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/T8BTbVZRvPn5eibLinnXLtpLDcJa02kc.png)
Answers
Answer:
n = 14
Step-by-step explanation: 28 n
the two blue triangles are similar. 28 is to n as n is to 7: -------- = ------
n 7
Then, after cross-multiplying, we have n^2 = 7(28) = 196
Taking the square root of both sides yields
n = 14
Answer:
n=14
bog3hgg hi jtv2khff
Rita has a sister named Gabriela who is 4 years older than she is. The product of their ages is 21. Write an equation to find their ages.
Answers
Step-by-step explanation:
let Rita = R
Let Gabriela = G
so we have
G ×R = 21
G= R + 4
(R+4)(R) = 21
R^2+4R -21=0
Identify the LIKE TERMS in the expression. −5x−3x+4+9x
Answers
Answer:
1x + 4
Step-by-step explanation:
-5x- 3x+ 4+ 9x
first you add -5x and -3x
which is
-8x
-8x + 4 + 9x
now you add -8x and 9x
which is
1x
final answer is
1x + 4
Answer:
-5x,-3x, and 9x
Step-by-step explanation:
these are like terms because they all have an x at the end. say there was a number like 7xb and 6xb, they would be like terms, however, if you have 3x and 3xb, they would not be like terms. When you have like terms you can combine them together. So for this, it would be
1x+4
hope this helps :)
PLZ HELP ILL MARK AS BRAINLIETS
Answers
Answer:
45ft²
Step-by-step explanation:
4 [ 2(6ft × 1.5ft) ÷ 2 ] + ( 3ft × 3ft )
= 4 [ 2(9) ÷ 2 ] + ( 3ft × 3ft )
= 4 [ 18 ÷ 2 ] + ( 3ft × 3ft )
= 4 ( 9 ) + ( 9 )
= 36 + 9
= 45ft
People at an airport can pass through security on one of two levels: level A or level B. Suppose that, on average, it takes people
22
2222 minutes to pass through security on level A with a standard deviation of
7
77 minutes. On level B, the mean and standard deviation are
20
2020 and
6
66 minutes, respectively.
Every day, the airport looks at an SRS of
100
100100 people who use level A, and an independent SRS of
150
150150 people who use level B. They calculate the mean time for each sample, then look at the difference
(
A
−
B
)
(A−B)left parenthesis, start text, A, end text, minus, start text, B, end text, right parenthesis between the sample means.
What are the mean and standard deviation (in minutes) of the sampling distribution of the difference in sample means?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
μ
x
ˉ
A
−
x
ˉ
B
=
2
σ
x
ˉ
A
−
x
ˉ
B
=
7
2
+
6
2
250
μ
x
ˉ
A
−
x
ˉ
B
σ
x
ˉ
A
−
x
ˉ
B
=2
=
250
7
2
+6
2
(Choice B)
B
μ
x
ˉ
A
−
x
ˉ
B
=
2
σ
x
ˉ
A
−
x
ˉ
B
=
7
2
100
+
6
2
150
μ
x
ˉ
A
−
x
ˉ
B
σ
x
ˉ
A
−
x
ˉ
B
=2
=
100
7
2
+
150
6
2
(Choice C)
C
μ
x
ˉ
A
−
x
ˉ
B
=
21
σ
x
ˉ
A
−
x
ˉ
B
=
7
2
+
6
2
250
μ
x
ˉ
A
−
x
ˉ
B
σ
x
ˉ
A
−
x
ˉ
B
=21
=
250
7
2
+6
2
(Choice D)
D
μ
x
ˉ
A
−
x
ˉ
B
=
21
σ
x
ˉ
A
−
x
ˉ
B
=
7
2
100
+
6
2
150
μ
x
ˉ
A
−
x
ˉ
B
σ
x
ˉ
A
−
x
ˉ
B
=21
=
100
7
2
+
150
6
2
Answers
The mean and standard deviation (in ) of the sampling distribution of the difference in sample means \(\sigma_1\) - \(\sigma_2\) = (7)² ÷100+ 6² /150.
What is standard deviation?A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.
Given:
Level A:
S.D. = 7
Level B: Mean = 20
S.D. = 6
So, \(\nu_1\) = 22
\(\nu_2\) = 20
Then, \(\nu_1\) - \(\nu_2\) = 22-20=2
and, \(\sigma_1\) - \(\sigma_2\)
= (7)² ÷100+ 6² /150
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What is the answer to the question??
Answers
Answer:you need to show the diagram in order for me to
Step-by-step explanation:
Rectangle A has a perimeter of 20 centimeters and an area of V 247 square centimeters, Rectangle B has a perimeter of centimeters and an area of square centimeters.
Answers
Given:
Ths length of the rectangle B is, l = 8 cm.
The breadth of the rectnagle is, b = 1 cm.
The objective is to find the Perimeter and Area of the rectangle B.
The perimeter of the rectangle B can be calculated as,
\(\begin{gathered} P=2(l+b) \\ =2(8+1) \\ =2(9) \\ =18\text{ cm} \end{gathered}\)The area of the rectangle B can be calculated as,
\(\begin{gathered} A=l\times b \\ =8\times1 \\ =8cm^2 \end{gathered}\)Hence, the perimeter of the reaaaaacngle is, 18 cm and the area of the rectangle is 8 square centimeters.
A survey of 400 students yielded the following information: 262 were seniors, 215 were commuters, and 150 of the seniors were commuters. How many of the 400 surveyed students were seniors or were commuters?
Answers
Out of the 400 surveyed students, 327 were either seniors or commuters.
To find the number of students who were either seniors or commuters out of the 400 surveyed students, we need to add the number of seniors and the number of commuters while avoiding double-counting those who fall into both categories.
According to the information given:
There were 262 seniors.
There were 215 commuters.
150 of the seniors were also commuters.
To avoid double-counting, we need to subtract the number of seniors who were also commuters from the total count of seniors and commuters.
Seniors or commuters = Total seniors + Total commuters - Seniors who are also commuters
= 262 + 215 - 150
= 327
Therefore, out of the 400 surveyed students, 327 were either seniors or commuters.
It's important to note that in this calculation, we accounted for the overlap between seniors and commuters (150 students who were both seniors and commuters) to avoid counting them twice.
This ensures an accurate count of the students who fall into either category.
For similar question on surveyed.
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The area of the base of a cylinder is 36 square inches and its height is 10 inches. A cone has the same area
for its base and the same height. What is the volume of the cone?
The volume of the cone is
in³.
I need help:((
Answers
Reason
Cone volume is 1/3 BH
(or 1/3 volume of a cylinder)
1/3 x 36 x 10
Answer = 120
Which is the largest ratio?
5/36, 2:9, 3 to 18, 1:3
Answers
The largest ratio, among the following ratios: 5/36, 2:9, 3 to 18, 1:3 is 1:3.
How the largest ratio is determined:The ratio refers to the relative size of one quantity compared to another.
The ratio, which is the quotient of two quantities or values, can be expressed as a decimal, percentage, or fraction. We can also express the ratio in its standard form (:).
Given Sum of Equivalent
Ratio Ratios Ratios
5/36 36 13.89% or 0.1389
2:9 11 18.18% or 0.1818
3 to 18 21 14.28% or 0.14.28
1:3 4 25% or 0.25
Thus, we can conclude that 1:3 is the largest ratio amont the others.
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Geometry work HELP ASAP trying to find the measure of a circumference!!
Answers
Answer:
65 degrees
Step-by-step explanation:
Since it is given that AB=DC
then we know that AO=DO and BO=CO because it is the radius of a same circle.
Hence the shapes are equal and thus DOC=65 degree as it serves as a corresponding angle to AOB
Go step by step to reduce the radical.
Square Root 200
Answers
Answer:
10 root 2
Step-by-step explanation:
root 200 = root 2 × root 100 = 10 root 2
help me please i and this asap
Answers
Answer: Select 2 because its 2 times the volume of cone
Step-by-step explanation:
Pls help for Algebra 11b = 143
Answers
Answer:
b= 13.................................
Step-by-step explanation:
143/11
a farmer wants to fence in three sides of a rectangular field shown below with 960 feet of fencing. The other side of the rectangle will be a river. If the enclosed area is to be a maximum, find the dimensions of the field.
Answers
9514 1404 393
Answer:
240 ft by 480 ft
Step-by-step explanation:
Area is maximized when the long side is half the total length of the fence. That makes the short side (out from the river) be half the length of the long side.
The fenced field dimensions are 240 feet by 480 feet.
__
You can let x represent the length of the long side. Then the length of the short side is half the remaining fence: (960 -x)/2.
The total area is the product of these dimensions:
A = x(960 -x)/2
We note that this is the equation of a parabola with zeros at x=0 and x=960. The maximum will be found on the line of symmetry, halfway between the zeros. That is at x = (0 +960)/2 = 480.
The area is maximized for a long-side dimension of 480 feet. The short sides are 240 feet.
8^2 + 5/3
evaluate show ur work!!:)
Answers
Answer:
I need this answer as well l. let me know
Answer:
65.7
Step-by-step explanation:
8^2 + 5/3
64 + 5/3
= 65.7
Three plane tickets to New York cost $2,472.If each plane ticket costs the same amount, about how much does one ticket cost?How much would the airline have to discount each ticket for the new total would be 2,400?
Answers
Answer: 824$ for each
and will have to discount 24$ for each ticket
Step-by-step explanation: 2472/3= 824
2400/3=800
824-800=24
You can buy 20 pens for $8 or 30 pens for $10. Which is the better deal?
Answers
Answer: It would be the first one (20 pens for 8$)
Step-by-step explanation: If you divide 20 by 8 then each pencil will be 2.50$. However if you divide 30 by 10 it will be 3 dollars for each pencil so the first deal will be better since you spend less money.
Which table represents a linear function?
(i’m trying to help my friend pass)
Answers
Answer:
if I remember I did this two days ago its was c
How can 26n - 7m +4(10n - 6m) be rewritten? A. 36n - 13m B. 40n - 9m C. 66n - 31m D. 35mn
Answers
Answer:
C. 66n - 31m
Step-by-step explanation:
26n - 7m + 4(10n - 6m)
26n - 7m + 40n - 24m
26n - 31m + 40n
66n - 31m
Please help!!! I need help
Answers
Answer:
Step-by-step explanation:
What the hell is that oh no I am not doing that
AC
Round your answer to the nearest hundredth.
3
70
B
Answers
Step by step explanation
Make more sense
I need help with this one
Answers
The mixed numbers are subtracted to get 6 4/5
How to perform the subtractionTo subtract mixed numbers we follow the following steps
convert the mixed numbers to improper fractions.
9 3/5 = (9 × 5 + 3) /5 = 48/5
2 4/5 = (2 × 5 + 4 )/5 = 14/5
Subtract the fractions.
= 48/5 - 14/5
= (48 - 14)/5
= 34/5
convert the improper fraction back to a mixed number
34/5 = 6 4/5
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To solve the following equation for k using the quadratic formula, what value would you substitute for b?
3k2 = 4k + 7
Answers
For this case we have a quadratic equation of the form:
ax² + bx + c = 0
Rewriting the equation we have:
3k² -4k - 7 = 0
So we have to:
a = 3
b = -4
c = -7
The solutions will come from:
k = -b±√b²-4(a)(c)/2(a)
Thus, the value of "b" is -4
Answer:
b = -4
Answer: -4
Step-by-step explanation:
i took the quiz its -4
Can someone help me with this pls
Answers
solve the system of equation for y using cramer's rule. hint: the determinant of the coefficient matrix is 4.
Answers
Cramer's rule states that the solution to a system of equations can be determined by taking the determinant of the coefficient matrix, which in this case is 4, and then dividing each equation's determinant of the corresponding matrix by the determinant of the coefficient matrix. This allows us to solve for the variable y.
Cramer's Rule is a method used to solve systems of linear equations. It states that the solution to a system of equations can be determined by taking the determinant of the coefficient matrix and then dividing each equation's determinant of the corresponding matrix by the determinant of the coefficient matrix. This gives us the solution for the variable y. To calculate the determinant of the coefficient matrix, we take the product of the diagonal elements and subtract the product of the elements that are not on the diagonal The determinant is calculated by taking the product of a and d, and then subtracting the product of b and c. Once we have the determinant of the coefficient matrix, we can calculate the determinants of each equation's corresponding matrix by replacing the y in the equation with 1 and the other coefficients with the original coefficients of the equation. We then divide each equation's determinant by the determinant of the coefficient matrix to solve for y. This method is useful as it allows us to solve a system of equations with multiple variables in a quick and efficient manner.
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can someone plz do this quickly?????? I have until 2:00 to do it!!!!!!!
Answers
Answer:
The Break-in by: Jimmy D Lock
Origin of Man by: Evan Lu Shun
Making Soap by: Phil T Hans
Please help :)
Solve 3(m-4)=33
Thanks so much :)
Answers
Answer:
3(m-4)=33
3m-12=33
3m=45
m=15
Check:
3(15-4)=33
3(11)=33
33=33
Hope This Helps!!!
Answer:
m = 15
Step-by-step explanation:
3 ( m - 4 ) = 33
Solve for m
3 ( m - 4 ) = 33
Divide both side by 3
\(\small \sf \frac{3(m-4)}{3} = \frac{33}{3} \\ \)
m - 4 = 11
Add 4 to both side
m - 4 + 4 = 11 + 4
m = 15
For what value of x is the equation 2(x + 1) - x = 10
Answers
Answer:
x=8
Step-by-step explanation:
Simplify 2(x+1)−x.
Simplify each term.2x+2−x=10
Subtract x from 2x.x+2=10
Move all terms not containing x to the right side of the equation.
Subtract 2
from both sides of the equation.x1−2
Subtract 2 from x = 10-2
subtract 2 from 10
hope that helps!
Answer: 8
Step-by-step explanation:
First, let's write out the equation:
2(x+1) - x = 10
So, we need to find the value of x.
Let's take an estimate of what x could be.
So, we know it has to be 5-10, because that is over when we add x to one, then multiply by 2.
So, numbers 5-7 couldn't be it, because the value of x is lower than 10. So, we have to guess if it's 8 or 9
Let's use both numbers to solve if it's correct:
2(8+1) - 8 =10
18 - 8 = 10
or
2(9+1) - 8 =10
20 - 8 = 12
So, we have 8 as our answer.
So, x = 8