Which algebraic equation correctly represents this statement? The square of the product of 4 and a number is the sum of the number and 15.

1. (4x)^2 = x + 15x
2. 4x^2 = x + 15
3. 2(4x) = x + 15
4.(4x)^2 = x + 15

I'll give brainliest if you answer right : )

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony?