Page 50 - Algebra 1

*21. Multiple Choice Simplify [(10 - 8)2 - (-1)] + (5 - 3).
(7) A -38 B 7 C -80 D 37
*22. Manufacturing A company produces two different types of 6-sided boxes. Box A is (7) 12 inches long, 12 inches wide, and 12 inches tall. Box B is 16 inches long,
16 inches wide, and 6.75 inches tall. Both boxes have the same volume, but the company wants to know which box uses less material to produce.
a. Write and solve an expression to find the surface area of Box A.
b. Write and solve an expression to find the surface area of Box B. c. Compare the box sizes. Which box uses less material?
*23. Multi-Step A ball is dropped from a height of 25.6 feet. After it hits the ground, it (6) bounces to 12.8 feet and falls back to the ground. Next it bounces to 6.4 feet and
falls back to the ground. Then it bounces to 3.2 feet and falls back to the ground. a. Find the difference in heights between each consecutive bounce.
b. If the pattern continues, will the ball ever stop bouncing? Explain. 24. Geometry What is the perimeter of the rectangle?
(6)
8.42 units
25. Measurement A valley is 250 below sea level and a small hill is 78 feet above sea
(5) level. Solve ⎪-250⎥ + 78 to determine the distance from the bottom of the valley
to the top of the hill.
*26. Transportation In the last hour, 7 planes have landed at the airport and 11 planes (5) have taken off. Use addition to find the change in the total number of planes at
the airport in the last hour.
27. Error Analysis The temperature in the morning was -18°F. It increased by 5° by noon (4) and dropped 10° in the evening. Two students determined the temperature in the
evening. Which student is correct? Explain the error.
*28. Meteorology The water level of the reservoir in Purcellville, Virginia was 2 feet (6) below normal. After a heavy rainstorm, the water level increased to 5 feet above
normal. Write and solve a subtraction problem to find the change in the water level caused by the rainstorm.
29. Multiple Choice Which term in the expression _√ 9ny + a2 - _n + _3π contains an (1) nx 48
nx 8 4
*30. Geometry Th_e measure of each interior angle of a hexagon is given by the
(7) 180(6 - 2)°
expression 6 . What is the measure of an interior angle of a
22.312 units
3 4
Student A
-18 + 5 + 10 = -3
Student B
-18 + 5 + (-10) = -23
irrational constant?
A √ 9 n y B 3 π C n D a ___
2
hexagon?
Lesson 7 35