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Ne4ueva [31]
2 years ago
9

The number of boys to girls in math class is 2:3 If there are 21 girls in Mrs. Vest's math class, how many boys are there? Can w

e use what we know about quivalent ratios to figure out how many boys are in the class?​
Mathematics
2 answers:
slega [8]2 years ago
6 0

Answer:

There are 14 boys in the class. Yes, we can use what we know to figure out how many boys are in the class.

Step-by-step explanation:

think about the ratio as a fraction if the fraction is 2/3 and then compare it to x/21 21/3 is 7 and 7*2 is 14

torisob [31]2 years ago
5 0

Answer:

there are 6 boys in the class

Step-by-step explanation:

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Which pair of lines is parallel? A. y=4x+1 and y+4=5 B. y=-2+x and 2y-2x=-2 C. y=1/4x + 2 and y-2=1/2x D. y=1/5x+1 and 5y+x= 10
sdas [7]

Answer:

B. y=-2+x and 2y-2x=-2

Step-by-step explanation:

Two lines are parallel if they have the same slope.

The equation 0of a line is tipically written as y=mx + b, where 'm' represents the slope and 'b' the y-intercept.

Let's evaluate each of the options:

A. y=4x+1 and y+4x=5

Writing the equations in the slope-intercept form, we get:

y=4x+1 → m=4

y=5-4x → m=-4

Given that they have different slopes, they are not parallel.

B. y=-2+x and 2y-2x=-2

Writing the equations in the slope-intercept form, we get:

y=-2+x → m=1

y=-1 + x → m=1

Given that the equations have the same slope, they are parallel.

C. y=1/4x + 2 and y-2=1/2x

Writing the equations in the slope-intercept form, we get:

y=1/4x + 2  → m=1/4

y=1/2x+2 → m=1/2

Given that they have different slopes, they are not parallel.

D. y=1/5x+1 and 5y+x= 10

Writing the equations in the slope-intercept form, we get:

y=1/5x+1 → m=1/5

5y+x= 10 → y=2 - 1/5x → m=-1/5

Given that they have different slopes, they are not parallel.

4 0
3 years ago
What digit can be in the ones place of a number that has 5 as a factor?
Sedaia [141]
0 and 5 can be in the one's place of a number that has 5 as a factor.
8 0
3 years ago
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The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. Last year there were 63 inches of s
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This is 2.5 standard deviations from the mean.

We find this by subtracting the mean from our value, and dividing by the standard deviation:
(63-38)/10 = 25/10 = 2.5
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3 years ago
Given f(x)=-4+1 find f(2)
AleksAgata [21]
I think you left out something, is it -4x+1
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3 years ago
Complete the function f(x)=2x-5
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Replace X in the equation with the values in the table and calculate:


2X-5:

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2(-2)-5 = -4-5 = -9

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2(3)-5 = 6-5 = 1

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3 years ago
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