Answer:
Hello :) 12345678910
Step-by-step explanation:
Addition you add and in subtraction you subtract
Answer:
$7.76
Step-by-step explanation:
Let x be the amount he was making before the raise.
He had an increase of 3.1% of x added to x which resulted in a new salary of $8.00 per hour.
Mathematically:

x = $7.76
He was making $7.76 before the raise.
That would be correct because if x times x =16 than that means that the square root of 16 is 4