Which expression is equivalent to (-2)to the 8th power

Asmall car averages up to 29 more miles per gallon of gas that an suv. if a small car averages 44 miles per gallon, what is the average miles per gallon for an suv?

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

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?