HELP! ANSWERS NEEDED ASAP! PLEASE!! In Exercises 4-6, solve the equation for the guven variable. Justify each step.

4. P = 2v; v
5. V = (pi)r^2h; h
6. S = (pi)rs + (pi)r^2: s

In Exercises 7 and 8, name the property of equality that the statement illustrates.

7. If x = y, then -2x = -2y
8. If m<A = m<B and m<B = 42⁰, then m<A = 42⁰.

In exercises 9-11, use the property to copy and complete the statement.

9. Addition Property of Equality: If m<J = 30⁰, then m<J + m<K = __.
10. Reflexive Property of Equality: GH = __
11. Distributive Property: If 3(x + 7) = 30, then ___ + ___ = 30.

12. The formula for the surface area of a rectangular prism is given by the equation A = 2lw + 2lh + 2hw, Where L is the length, W is the width, and H is the height. Solve the formula for W and justify each step. Thalen find the width of the prism if the total surface area is 52 in², the length is 2 inches, and the height is 4 inches.