30.
$500
$600
OK, so you do 7x4 (seven is the main number, and 4 quarters are a whole). The answer to 7x4 is 28. Then in a half there are 2 quarters, so you add 2 to 28 which is 30
30
22.5
40 divided by 4= 10 10 x 3=30 so three quarters of 40 is 30
160 quarters 4 quarters = 1 dollar 160 quarters = 40 dollars
30 centimeters.
30
30
it is impossible to make $30 with 2 quarters; and a quarter cannot equal a nickel