You are given the difference of the numbers of boys and girls in a class and the ratio of boys to girls. How many boys and how many girls are in the class? 3 more boys; 5 for every 4

Step-by-step explanation:

b/g=5/4

b=5g/4, we are also told b=g+3, since b=b we can say

5g/4=g+3, multiply each side by 4

5g=4g+12, subtract 4g from each side

g=12, and since b=g+3

b=12+3=15

So there are 15 boys and 12 girls.

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.

it is 28 degrees colder in detroit than philadelphia.

step-by-step explanation:

what number adds to 21

-7 + ? = 21

-7 + 28 = 21

hope it