Ineed to know how to solve part b !

Xavier spent $84 on supplies (so this is an expense we will make only once), and then he will spend one more dollar for each canvas. So, his total expense for paintings will be

Similarly, he will get 8 dollars for each painting, so he will earn

dollars if he will sell paintings.

In order to break even, earnings and costs must be equal:

Subtract p from both sides:

Divide both sides by 7:

So, he has to sell at least 12 paintings to break even.

i think the answer is b)

step-by-step explanation: