Which choice correctly shows the solution(s) of the equation x2 = 121? a) x = √ 121 b) x = − √ 121 c) x = ± √ 11 d) x = ± √ 121

Hello from MrBillDoesMath!

Choice D, x = +\ sqrt(121)

Discussion:

x^2 = 121           =>          take square roots of both sides

x = +\- sqrt(121) =>         as sqrt(121) = +\- 11

x = +\- 11                    

The closest answer is D as it includes both values of x,  unlike choices A and B which include a single value of the square root

Thank you,

MrB

(a) the volume of the cone is 20/3 in3

hence, option a is correct.

answer: check all that apply, where the options?

step-by-step explanation: