F (x) = 5(4) ^x Is the right answer
For this you will need to calculate the number of sweaters - 7x. Then you need to calculate the number of shirts - 9y. Last you need to calculate the number of pants - 12z. To balance the equation, you must calculate the total price $172+$269+$74 = $515. The equation is 7x+9y+12z = $515.
You’re correct, it’s 16. Constant proportionality mean how much Y moves. So it’s 16!
#1 87.5% or round up to 88%
#2 50%
#3 75%
He has 19 folders in all. 8+6+5=19