How to find out if a table is proportional

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

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels