Please help asap! (Middle school math

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Glenda makes an online purchase for picture frames for $12.95 each and formats of $5.89 each the site says it taxes paid by the customer or 6.5% of the total purchase price shipping charges are based on the