What is the value of the following expression? -9/4➕-8/5-2 1/2

Jessica is a custodian at oracle arena.she waxes 20 m2 of the floor in 3/5 of an hour. jessica waxes the floor at a constant rate.at this rate how many sqaures meters can she wax per hour

Select the quadratic that has root x = 8 and x = -5

What is the frequency of the sinusoidal graph?