I REALLY NEED HELP, it's due in 20 minutes so a quick reply would be life-changing thank you so much to whoever can help! I really appreciate it. Have a great day.

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14