Find measurement of these angles please , and answer my other question for 57 points people put wrong answers ..

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?

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Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?