Given: -5x+2/7 - -4: Prove: X=6 Pls Help Picture little blurry

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

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?

M∠cbd=4x+52∘ m∠abc=8x−10∘\qquad m \angle abc = 8x - 10^\circm∠abc=8x−10∘ find m∠cbdm\angle cbdm∠cbd: