Choose all the triangular equilateral and the none of the triangular faces is equilateral. I can’t put all the photos

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

Answer asap evaluate 4-0.25g+0.5h4−0.25g+0.5h when g=10g=10 and h=5h=5.

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?