Estimate the sum of 672 and 830 by rounding to the nearest hundred before adding

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

Just tell me how to set up the equation.

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?