Question

answer this pls and answer the right answer​

Answer 1

Step-by-step explanation:

7) x = -1

then 3x^2 = 3(-1)^2

= 3

8) 5^6 * 5^2x = 5^10

5^(6+2x) = 5^10

bases are equal then powers are equal

6 + 2x = 10

2x = 10 - 6

x = 4/2

x = 2

9)area = 1/2 * breadth * height

= 1/2 * 8 * 5

= 40/2

= 20sqcm