I am not sure I am writing this correctly:

Question

What is the domain of the function
y=3(sq rt)6x+42
• x ≥ 0
• x ≤ 7
• x ≥ –6
• x ≥ –7

Answer 1

From the choices of answers, I think you typed the equation incorrectly

Looks like it should be
y = 3√(6x+42)
since we cannot take the square root of negatives,
6x + 42 ≥ 0
6x ≥ -42
x ≥ -7 , which is your last choice.