Hey i think you meant to add an attachment but it did not upload unless you mean
x=4-w
Answer:I dont belive i know
Step-by-step explanation:
Answer:
40
Step-by-step explanation:
60/3.75=x/2.5
Answer:

General Formulas and Concepts:
<u>Calculus</u>
Antiderivatives - Integrals
Integration Constant C
Integration Property [Multiplied Constant]: 
Trig Integration: 
U-Substitution
Step-by-step explanation:
<u>Step 1: Define</u>

<u>Step 2: Identify Substitution Variables</u>
u = 3x
du = 3dx
<u>Step 3: Integrate</u>
- [Integral] Rewrite:

- [Integral] U-Substitution:

- [Integral] Trig Integration:
![\displaystyle \frac{1}{3}[-cos(u)] + C](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B1%7D%7B3%7D%5B-cos%28u%29%5D%20%2B%20C)
- [Expression] Multiply:

- [Expression] Back-Substitute:

<span>M=2.60b + 50
When b = 25
M = 2.60(25) + 50 = $115
Answer: Chris earns $115 for selling the 25 books.</span>