If i have 7 quarters, 13 nickles, 23 pennies, 6 dimes and two dollar bills, how much money do i have

Find the difference (8ab+a+2) - (3ab+6)

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x