Need some (: ! consider the quadratic equation below. (4x+z)(3x-w)=0 if w=21, determine an x-intercept of the parabola represented by this equation. a) (21,0) b) (-7,0) c) (-21,0) or d) (7,0)

Th perimeter of a rectangular garden is 150 feet. the length is 50 feet longer than the width, w. which equation could be used to calculate the width of the garden? a.) 2w+ 2(w-50) =150 b.) 2w+50 + 2w =150 c.) 2(w+50) + w =150 d.) 2w+ 2(w + 50) = 150 need asap. will give brainliest !