Page 140 - Algebra 1

11. Write Explain which terms in 3z2y + 2yz - 4y2z - z2y + 8yz can be combined. (18)
12. Astronomy The relative weight of an object on the surface of Jupiter can be found (9) using 2.364w, where w is the weight of the object on Earth. The space shuttle
weighs about 4,500,000 pounds on earth. What would be the weight of the space shuttle on Jupiter?
13. Geometry The length of a frame is 8 inches. Let w be the width of the frame.
(20) The formula A = 8w calculates the area of backing needed for a framed picture.
Complete the table and graph the solutions.
w
A
2
4
6
8
14. Simplify-4-3+2-4-3-8. (6)
15. Multiple Choice Simplify 5p + 7 - 8p + 2.
(18) A 9-3p B 3p-9 C 13p+5 D 13p-9
16. Verify Evaluate _2 (4 + _3 ) using two different methods. Verify the solution of each (15) 34
method.
17. Probability A letter of the alphabet is randomly chosen. What is the probability
(14) that the letter is a vowel?
18. Justify The area of a square is 100 square feet, what is the length of each side?
(13) Explain.
Measurement A picture framer calculates the amount of materials needed
3 4 19.
(12) using 2l + 2w. If the framer used 2w + 2l, would the results be the same? Explain.
*20. Multi-Step Alda’s school is 1200 yards from her house. She walks 150 yards (20) per minute. The equation y = 1200 - 150x represents how far she will be
from the school after x minutes.
a. Complete the table and graph the solutions.
b. What does it mean to say that after 8 minutes, she is 0 yards from the school?
x
y
1
4
6
8
*21. Analyze A student says that to solve -_3 x = 12 you should divide each side (21) _3 4
by - 4 . Another student says that to solve the equation you should multiply
each side by -_4 . Will both methods result in the correct solution? Explain. 3
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