Polynomial & Rational Function Word Problems Exam

The height of a water balloon that is launched into the air is given by h(t) = -5x²+20x+25. When will the balloon explode on the ground?

• After 5 seconds

• After 1 second

• After 2 seconds

• After 3 seconds

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?

Tags

CCSS.HSA.CED.A.1

George can build a laptop twice as fast as Kurt. Working together, it takes them 3 hours. Which equation would you use to determine how long it will take Kurt working alone?

Tags

CCSS.HSA.CED.A.1

The height, y, of a ball tossed into the air can be represented by the equation

y = −x² + 10x + 3, where x is the elapsed time. What is the equation of the axis of symmetry of this parabola?

• y = 5

• y = -5

• x = 5

• x = -5

Tags

CCSS.HSF-IF.C.7A

The product of two numbers is 640. Their difference is 12. In order to find the two numbers you can use equations ​ (a)   and x-y=12.

• x*y=640
• x+y=640
• x/y=640
• x-y=640

Tags

CCSS.8.EE.C.8C

The product of two numbers is 640. Their difference is 12. What are the two numbers?

• 16 and 40

• 42 and 30

• 32 and 20

• 12 and 24

Mathematical Equivalence

ON

The length of a rectangle is 5 cm greater than its' width. The perimeter of the rectangle is 58 cm. Write an equation for the length of the rectangle. (use "a" to represent width)

Mathematical Equivalence

ON

Tags

CCSS.8.EE.C.7B

The length of a rectangle is 5 cm greater than its' width. The perimeter of the rectangle is 58 cm. What is the area of the rectangle?

Mathematical Equivalence

OFF

Xbox games pass costs $49 to activate and $15 per month to maintain a subscription. Write an equation that describes cost per month (y) after playing for several months (x).

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2