Which graph represents (x, y)-pairs that make the equation y = x+3 true?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

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