A line has a slope of -1/2 and a y-intercept of -2. what is the x-intercept of the line?

∆abc is reflected across the x-axis and translated 2 units up to give the image ∆a'b'c' with coordinates a'(1, 1), b'(2, -1), c'(2, 1). what are the coordinates of the preimage ∆abc? a. a(-1, 1), b(-2, 3), c(-2, 1) b. a(1, 1), b(2, 3), c(2, 1) c. a(1, -3), b(2, -1), c(2, -3) d. a(1, -3), b(2, -5), c(2, -3)

Can someone me do math because i am having a breakdown rn because i don’t get it

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)