How to subtract with the same denominator?

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Which of the following represents the range of the graph of f(x) below