Bills right because the y-intercept is 50 so I’m think what he’s saying about the rocket being launched 50 feet above water is right
Answer:
or 8.944
Step-by-step explanation:

Simplify

Square root both sides to get x by itself

or 8.944
Today: x=19
y=67+19=86
9 years ago: x=19-9=10
y=86-9=77
The total age 9 years ago: x+y=10+77=87