a shop owner buys 50 shirts for $9.75 and sells 40 of the shirts for $12.95. she has a sale and sells the rest for $7.50, what is the profit or loss for the 50 shirts

Can someone me with this problem . show your work .

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.