Question

I didn't understand it please help

Answer 1

c -10

Explanation:

use BODMAS

B BRACKETS

O OF

D DIVISION

M MULTIPLICATION

A ADITION

S SUBSTRACTION

7+3= 10

7-8= -1

10 * -1 = -10

Hence proved ........

Answer 2

C. -10

Explanation:

(7+3)(7-8)

10 x -1

-10