Question

I did a already and for b I got 4.2 room cleans but I think I did something wrong

Answer 1

Answer:

• (a)y=10x+8

,

• (b)5 room cleans

Explanation:

Part A

• Weekly Allowance = $8

,

• Reward per room clean = $10.

(a)An equation that represents the weekly income (y in dollars) for x rooms cleaned is:

$y=10x+8$

Part B

The baseball bat costs $50.

In order to have enough, you have to earn at least $50 in weekly income.

$10x+8=50$

Solve the equation for x.

$\begin{gathered} Subtract\text{ 8 from both sides} \\ 10x+8-8=50-8 \\ 10x=42 \\ \text{Divide both sides by 10} \\ \frac{10x}{10}=\frac{42}{10} \\ x=4.2 \end{gathered}$

Since there is no reward for cleaning your room halfway, round to the next whole integer.

$x\approx5$

The number of room cleans required to earn enough money in one week to buy the baseball bat is 5.