In a fraction with a denominator of 15, which value could the numerator be to produce a repeating decimal
15
09
On
12

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.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Two numbers have a sum of -19. one number is x. what expression represents the other number?