Which of the following is the solution to r/9 - 7 = -4 (1) r=-27
(3) r =99
(2) r=1
(4) r= 27

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.

Lauren has five shells she found on the beach seashells represent one-third of the shells her whole collection how many shells does lauren have in her whole collection