3) can you guy help for this questiong

2/3(-6y+9x) expand each expression using the distributive property

Which function has an inverse function? a.f(x)= |x+3|/5 b. f(x)= x^5-3 c. f(x)= x^4/7+27 d. f(x)= 1/x²

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.