Alinear function in the form y=mx+b for the line passing through (4.5, - 4.25) with y intercept 2.5

Triangle knm is what is true about the sides of knm

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

What is the measure of angle x? a.101 b.158 c.44 d.79