Answer:
C
Step-by-step explanation:
3/4 = 6/8 = 9/12
4/5 = 8/10 = 12/15
Answer:
10
Step-by-step explanation:
let the number be n then half the number is
n, then
n +
n = 15
Multiply through by 2 to clear the fraction
2n + n = 30, that is
3n = 30 ( divide both sides by 3 )
n = 10
Thus the number is 10
3x = B
(x + 80 = 1/2B) * -3
-3x-240 = -3/2B
-240 = -1/2B
B=480 pennies