Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

28 Quarters and 40 Dimes

Step-by-step explanation:

Q=x

D=x+12

0.25(x)+0.10(x+12)=11.00

0.25x+0.10x+1.2=11.00

0.35x=9.80

x=28

Q=x=28

D=x+12=28+12=40

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6