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Jasmine usually takes 3 hr more than Molly does to process a day’s orders at Books To Go. If Molly takes t hr to process a day’s orders, the function given by $$ H(t)=\frac{t^{2}+3 t}{2 t+3} $$ can be used to determine how long it would take if they worked together. How long will it take them, working together, to complete a day's orders if Molly can process the srders alone in 7 hr?

Classify each of the following as either an expression or an equation. $$\frac{7 t}{2 t-3} \div \frac{3 t}{2 t+3}$$

Determine whether each situation represents direct variation or inverse variation. Mia swam 2 laps in 7 min and 6 laps in 21 min.

The San Paulo community swimming pool can be filled in 12 hr if water enters through a pipe alone or in 30 hr if water enters through a hose alone. If water is entering through both the pipe and the hose, how long will it take to fill the pool?

Perform the indicated operation. Simplify, if possible. $$ \frac{2}{c^{2} d}+\frac{7}{c d^{3}} $$

Classify each of the following as either an expression or an equation. $$\frac{5 x}{x^{2}-4} \cdot \frac{7}{x^{2}-5 x+4}$$

Multiply. Leave each answer in factored form. $$\frac{a-4}{a+6} \cdot \frac{a+2}{a+6}$$

Multiply. Leave each answer in factored form. $$\frac{a+3}{a+6} \cdot \frac{a+3}{a-1}$$

Determine whether each situation represents direct variation or inverse variation. It took 2 band members 80 min to set up for a show; with 4 members working, it took 40 min.

Classify each of the following as either an expression or an equation. $$\frac{7 x}{2-x}=\frac{3}{4-x}$$