-6(-5cv + 6) - 10v Simplify each expression. I also need step by step so if you can explain id appreciate it :)

Which of the following expressions is equal to 2x^2+8

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.