Checkpoint #5 Study Guide

Express in simplest radical form. 2√45

• 3√5

• 5√5

• 6√5

• 18√5

Simplify 5√7 + 3√28

• 9√7

• 11√7

• 60√7

• 8√35

• 22 feet

• 11 feet

Find x. If your answer is not an integer, leave it in simplest radical form.

• 2

• 12√3

• 1/2

• 6√3

The end of a dog's leash is attached to the top of a 5-foot-tall fence post, as shown in the diagram below. The dog is 7 feet away from the base of the fence post. How long is the leash, to the nearest tenth of a foot?

• 4.9 ft

• 8.6 ft

• 9.0 ft

• 12.0 ft

Write the ratios for sin A and cos A.

• sin A = 3/5, cos A = 4/5

• sin A = 4/5, cos A = 3/5

• sin A = 3/4, cos A = 4/5

• sin A = 3/5, cos A = 4/3

Find x. Round your answer to the nearest tenth.

• 3.3

• 3.1

• 24.7

• 8.5