UNIT 4 TEST

Front

To add or subtract rational expressions we must have a _____________

Back

common denominator

Front

A boat goes 10 miles downstream in the same time it can go 3 miles upstream. The speed of the current is 2 miles per hour. Which equation could you use to find the speed of the boat in still water?

Back

Front

Solve for x: 2x + 8 = 0

Back

-4

Front

Two robots can do a task in 5 min, working together. The first robot, working alone, can do the task in 15 min. How many minutes will it take the second robot, working alone, to do the task?

Back

7.5

Front

Pick the best description for the End Behaviors as x approaches to positive infinity for the function f(x)=\frac{1}{x-2}+5.

Back

The graph approaches y = 5

Front

What is a rational expression?

Back

A fraction where the numerator and the denominator are both polynomials.

Front

Define common denominator.

Back

A common multiple of the denominators of two or more fractions.

Front

What is the formula for speed?

Back

Speed = Distance / Time

Front

What is the relationship between upstream and downstream speed?

Back

Downstream speed = speed of boat + speed of current; Upstream speed = speed of boat - speed of current.

Front

What is the formula for work done by two workers together?

Back

Work = Rate1 + Rate2