How many pieces of are in 4 packages of gum

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Don't know how to find x given these segment lengths

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