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Solve.One pump can drain a pool in 9 minutes. When a second pump is also used, the pool only takes 5 minutes to drain. How long would it take the second pump to drain the pool if it were the only pump in use?

Solve the equation for the specified variable.A = for a

Add the proper constant to each binomial so that the resulting trinomial is a perfect square trinomial. Then factor the trinomial.x2 – 16x + _______

Simplify. Write the answer with positive exponents.5

Multiply.(9x + 5)2

Perform the indicated operations.(9×5 + 9×4) + (9×5 + 6×4 – 5)

Hold the front and back of your calculator to the camera for 10 seconds each side – count outloud. Hold your clean whitebaord up to the camera. 

Factor the polynomial completely.4y – 24 + xy – 6x

Multiply.(2×8)(4×9)

Multiply.(4x + 9)(4x + 8)