Lines AB and CD (if shown) are straight lines. Find x. Give reasons to justify your solutions.

Reflect the point (7,0) across the y-axis

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

Four quarts of a latex enamel paint will cover about 200 square feet of wall surface. how many quarts are needed to cover 98 square feet of kitchen wall and 52 square feet of bathroom wall