a) C = 40 + 30t
b) 280 = 40 + 30t
30t = 240
t = 8
The plumber worked 8 hours
Step-by-step explanation:
In my opinion Option A is the correct answer because
Product of 3 and x = 3x
7.5 more than that = 3x + 7.5
Answer:
the fourth clock listed option D?
Step-by-step explanation:
<u>Given </u>that the functions
and 
We need to determine the value of the function 
First, we shall determine the composition of the function 
<u>Function </u>
<u>:</u>
Let us determine the function 
Thus, we have;
![(g \circ f)(x)=g[f(x)]](https://tex.z-dn.net/?f=%28g%20%5Ccirc%20f%29%28x%29%3Dg%5Bf%28x%29%5D)
![=g[x+4]](https://tex.z-dn.net/?f=%3Dg%5Bx%2B4%5D)



Thus, the function is 
<u>Value of the function </u>
<u>:</u>
The value of the function can be determined by substituting x = -3 in the function 
Thus, we have;

Simplifying the terms, we get;



Thus, the value of the function
is 1.