Please help me solve this

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

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

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?