Suppose y varies directly as x and y = 21 an x=3 find x when y=42

Asap will give brainiest to first person to answer what is the measure of angle b in the triangle? enter your answer in the box.m∠b=

Determine the intercepts of the line that passes through the following points. (15,-3)(15,−3) (20,-5)(20,−5) (25,-7)(25,−7)

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)