What is the change in elevation between 8500 and -300

Which of the following expressions is equal to 2x^2+8

If jaime wants to find 60% of 320, which table should he use?

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921