Question

PLS ANSWER

Answer 1

Answer:

The answer would be C. -4.

Step-by-step explanation:

x^2=64

x=8

2(8)-20=-4

Answer 2

Explanation:

• Here, We are given the value of x and we need to solve for x first of all and then put that value of x in the second equation...

X²=64 ----- 1️⃣

2x-20 ----- 2️⃣

By equation 1️⃣ we have:

$\sf {x}^{2} = 64 \\ \sf \: x = \sqrt{64} \\ \sf \: x = 8$

Substitute this value into equation 2️⃣:

$\sf \: 2x - 20 \\ \sf \: 2 \times 8 - 20 \\ \sf \: 16 - 20 \\ \boxed{ \tt \: - 4}$