3x - 4y = 18
x + 3y = -7

Which of the following pairs of functions are inverses of each other? o a. f(x)=x72+8 and 96-9 = 7/x+2) =8 o b. f(x)= 6(x - 2)+3 and g(x) - *#2-3 o c. $4) = 5(2)-3 and 90- 4*: 73 o d. f(x) = 6)-12 and 910 – +12

Simplify the expression. -2/5(10+15m-20n)

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28