Can an equation have more than one solution? Explain

Witch represents the inverse of the function f(x)=1/4x-12

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122