Triangle PQR has vertices P(-3, -5),Q(2, -5) and R(1, -7). Prove that triangle PQR is right angled. (Hint: Find the gradients.)

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Which number produces a rationale number when multiplied by 1/5

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12