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

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees