Which of the following could be a solution to x^2 = 400

a. -200
b. -20
c. 40
d. 100

b

Step-by-step explanation:

Given

x² = 400 ( take the square root of both sides )

x = ± = ± 20

Thus x = - 20 is a solution of the equation → b

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

both graphs increase on their domain

neither graph has a y-intercept

step-by-step explanation:

the following points can be visualized easily from the graph