I just need help solving this problem. Also please don't put the answer into a file because I can't open them. It's also really sketchy.

Classify the following triangle check all that apply

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Since we have computer algebra systems that can solve polynomial division problems for us, why is it necessary to learn how to do these things by hand?