Question

Maria has $2.43 in quarters and pennies in her wallet. She has twice as many pennies as quarters. How many coins of each type does she have?

Answer 1

Given maria has $\\\ 2.43$ in the pennies & quarters.

she has twice as many pennies  as quarters.

find out the coins

let us assume the  quarters are x

than the pennies are 2x.

Formula

 value of the pennies +  value of the quarters = total value of coins

1 quarters =$ 0.25

1 pennies = $0.01

Thus

0.25x + 0.01 (2x) = 2.43

0.27 x = 2.43

x = 9

2x = 18

i.e the number of quarters are 9 and the number of pennies are 18.

Hence proved

Answer 2

Answer: 9 quarters and 18 pennies

Step-by-step explanation:

0.25q+0.01(2q)=2.43

Multiply. 0.25q+0.02q=2.43

Combine like terms. 0.27q=2.43

Divide by 0.27. q=9 quarters

The number of pennies is 2q.

2q  = 2⋅9  = 18 pennies