I am assuming you meant to write b(x) = x-4.

Since this is a linear function, the domain is all real numbers.
Answer:
the diver was 450 ft below sea level
Step-by-step explanation:
25ft per min
25x10=250
250+200=450ft
Answer: 
Step-by-step explanation:
Using the same-side interior angles theorem,
.
Using the alternate interior angles theorem, 
Simplify 3x × 2 to 6x
6x - x + 8y + 4x × 2 - 3x - 5y
Simplify 4x × 2 to 8x
6x - x + 8y + 8x - 3x - 5y
Simplify
<u>10x + 3y</u>