A scuba diver starts her dive at an elevation of 0 feet. If her elevation changes by −40 1/2 feet per minute, what will be her elevation after 3 minutes? Group of answer choices:
−121 1/2 feet

−118 1/2 feet

118 1/2 feet

121 1/2 feet

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Negative 5 1/12 + negative 4 1/4 + 6 3/4