4.Find the solution mentally. a. 3 x -4 = a
b. b x (-3) = -12
c. -12 x c = 12
d. d x 24 = -12

30 pts, will mark brainliestwhat is the period of the sinusoidal function? (picture 1)what is the minimum of the sinusoidal function? (picture2)what is the maximum of the sinusoidal function? (picture 3)

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Just tell me how to set up the equation.