can someone pls help me with solving one variable expressions pls show your work too so i can understand thanks

Use the multiplier method to incrases £258 by 43%

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

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9