Find lowest common denominator: 1/3, 2/9, 5/12

Which expression gives the exact value of x?

Suppose that the function f is defined. , for all real numbers, as follows. _ \ 1/4x² -4 if x≠ -2 f(x)=< /_-1 if x=-2 find f(-5), f(-2), and f(4)

Which number completes the system of linear inequalities represented by the graph? y > 2x – 2 and x + 4y >