The first answer gets brainliest! simplify and show your work

*note: brainliest does show up till a couple of days for me. i will keep note of who answered first*

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

Solve for x and select the correct answer