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3 years ago

At summer camp the ratio of boys to girls was 7:2 If there were 21 boys how many girls were there?

1 answer:

3 0

$Ratio:\\7:2\\\\
7x-number\ of\ boys\\2x-number\ of\ boys\\\\
7x=21\ \ \ |:7\\
x=3\\\\
2x=2*3=6\\
Number\ of\ girls\ is\ equal\ to\ 6.$

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Solve the simultaneous equations

Elza [17]

Answer:

Step-by-step explanation:

2×-3y = 12 ( multiply whit 4)

3x + 4y =1 (multiply whit 3 )

8x -12y =48

9X+ 12y = 3

if you add this equations

17X =51

X= 51 / 17

x=3

7 0

3 years ago

Read 2 more answers

Help pls!!!! I would really appreciate your help :)

IgorC [24]

Answer:

1921579

Step-by-step explanation:

We can work this out by simply plugging the given value 2 into the functions in ascending order:

$G(2) = 3(2) - 11\\= 6 - 11\\= -5$

$F(-5) = 2(-5)^2 + 4(-5) + 10\\= 2 * 25 - 20 + 10\\= 50 - 20 + 10\\= 40$

$H(40) = 3(40)^3 + 40^2 - 21\\= 3 * 64000 + 1600 - 21\\= 192000 + 1600 - 21\\= 1921579$

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3 years ago

More than half of 2000.00 equals how much

lina2011 [118]

1000 IS THE ANSWER EJN3;RVLGBPOIJGNTIOG;K

3 0

3 years ago

Select the equation that represents a line with a slope of 2 and that contains the point (1, -5).

kondor19780726 [428]

To get the equation of a line, you can use the following:

y - y1 = m (x - x1)

Where:

m is the slope (2)
y1 is the y coordinate of a point (1, -5)
x1 is the x coordinate of the same point (1, -5)

Just substitute in the values:

y - y1 = m (x - x1)

y - (-5) = 2(x - 1) ( - - 5 = + 5 )

y + 5 = 2(x - 1)

_________________________

Answer:

B. y + 5 = 2(x - 1)

6 0

3 years ago

1. Michelle purchased 25 audio files in January. In February she

san4es73 [151]

Answer:

Michelle purchased 25 audio files in January. The percent increase is 60%

Solution:

Given Data:

Michelle purchases = 25 audio files in January

Again purchased = 40 audio files in February

We need to find the percent increase for the given data.

Step 1:

Use the formula for percent change ,

$=\frac{\text { amount of change }}{\text { original amount. }}$

Step 2:

First we find the amount of change from the question.

Amount of change = 40 – 25

By subtracting, we get 15.

Step 3:

substitute the values in formula we get,

Formula percent change = $\frac{15}{25}$ = 0.6

Percent = 0.6 $\times$ 100 = 60 %.

Result:

Michelle purchased 25 audio files in January. And In February she purchased 40 audio files. Hence the percent increase is 60%.

8 0

3 years ago