Hello!
The answers are:
First box: 7 times the cube of the sum of x and 8
Second box: 8 added to the cube of 7x.
Third box: 8 added to 7 and x cubed.
Fourth box: the cube of the sum of 7x and 8.
Why?
We are given the expression and we need to macth to the correct verbal description, so we have:
First box:
![7(x+8)x^(3)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/c5sd01jwa0ao2olx0m9e0w1fouq9kpkj7f.png)
It's 7 times the cube of the sum of x and 8
Second box:
![(7x)^(3)+8](https://img.qammunity.org/2020/formulas/mathematics/middle-school/j23layrrou5tdl5vpasykx8kzn3dgq0cll.png)
We have that "7x" is cubed and then, added to 8, so, it's 8 added to the cube of 7x.
Third box:
![7x^(3)+8](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6snn1o597xswdz9y79589y6nck0dqvtpr8.png)
We have "7" times "x" cubed and added to 8, so it's 8 added to 7 and x cubed.
Fourth box:
![(7x+8)x^(3)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ghqx2a9gumnn5ijvd2qett14o0avibf3s4.png)
We have "7x" added to 8, and the expression is cubed, so, it's the cube of the sum of 7x and 8.
Have a nice day!