91Ó°ÊÓ

Perform the indicated operation. (pp. 750–752)

$13.8-9.3$

Use the distributive property to evaluate the expression.

$-3  (9-1+6)$

History In 1628, the Swedish ship Vasa sank in Stockholm Harbor in 105 feet of water. In 1959, salvagers used pontoons and cables to move the Vasa to a shallower depth of 50 feet. Underwater repairs were then made to strengthen the ship, and in 1961 the Vasa was lifted to the surface.

a. Find the change in the Vasa’s position with respect to sea level as a result of the salvage work done in 1959.

b. Find the number of years the Vasa remained underwater.

Write a variable expression to represent the phrase. (Lesson 1.1)

A number increased by 10

Geometry Find the value of x for the given triangle or rectangle

Perimeter = 10 m

Evaluate the expression. Justify each of your steps.

$44  +  19  +  16  +  31$

Evaluate the expression when.$x=−5\text{ â¶Ä‰â¶Ä‰a²Ô»å â¶Ä‰â¶Ä‰}y\text{ â¶Ä‰}=\text{ â¶Ä‰}−3$ (Lessons 1.5–1.7)

$x−y+6$

Perform the indicated operation. (pp. 750–752)

$3.239-1.74$

Critical Thinking In Example 2 on page 92, you saw that the equation $34=y$ is equivalent to $23=y-11$. Write an equation that has $y+5y$as its right side and is also equivalent to$23=y-11$.

Find the value of x for the given triangle or rectangle

Area = 75.52 ft²