Simplify the expression. Write your answer using only positive exponents. Evaluate any numerical powers. 3^4⋅x⋅(3/x^2)^−2

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Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Evaluate 5 + 6 · 2 – 8 ÷ 4 + 7 using the correct order of operations. a. 22 b. 11 c. 27 d. 5