can you help me with number 4

3. a. What does it mean to cube something? b. Based on part a, write out what (x+ 5) 3 means (i.e., write a multiplication problem). c. Multiply out your answer to part b. Write your answer in standard form. d. Tammy says (x + 5)3 = x3 + 125 because she cubed x to get x3 and she cubed 5 to get 125. What is wrong with Tammy's reasoning? Explain clearly. 4. a. Write an expression that gives the perimeter of this triangle in terms of x. x+ 3 2x x+4 b. Write an expression that gives the area of this triangle in terms of X. 5x + 7 c. If you want the perimeter of your triangle to be 90 feet, what should be the value of x? (Give a number.) d. Based on your answers to part b and c, what would the area of your triangle be? (Give a number.)