Activity

Do as indicated.

1. Solve for x in 7 : 10 = x : 20

2. Solve for x in x : 5 = 12 : 15

3. Solve for x in (x-5) : (x+3) = 2 : 6

4. A cake recipe uses 5 cups of flour for every 2 cups of sugar. If you want to make a recipe using 8 cups of sugar, how much cups of flour should be used?

5. The ratio of boys to girls in the Mathematics club is 4 to 5. If there are 25 girls in the club, how many boys are in the club?