Question

Please answer I’m struggling

Answer 1

7. 8

8. -2a+14

Explanation:

(Excuse this form of the expression)

7.

u = 5

(3 + u)²

---------

8

Plug in

(3 + 5)²

---------

8

(8)²

---------

8

64

---- = 8

8

8.

-2(a - 7)

Multiply -2 with each number in the parenthesis

-2a + 14

Answer 2

Explanation:

Question 7.

`\frac{{(3 + u)}^(2) }{8}`

[When u = 5]

`= \frac{{(3 + 5)}^(2) }{8}`

`= \frac{ {(8)}^(2) }{8}`

`= (8 * 8)/(8)`

= 8 (Ans)

Question 8.

-2(a - 7)

(Using Distributive property)

= - 2 × a -2 × (-7)

= -2a + 14 (Ans)