Download Simplify each expression. 1. (x )(7x ) ANSWER: 7x 2. (5a bc )(−6a bc

Practice Test - Chapter 7
Simplify each expression.
2
8
1. (x )(7x )
ANSWER: 7x
10
7
2
2
5
2. (5a bc )(−6a bc )
ANSWER: 9 2 7
−30a b c
3. MULTIPLE CHOICE Express the volume of the solid as a monomial.
3
A x
B 6x
C 6x3
6
D x
ANSWER: A
Simplify each expression. Assume that no denominator equals 0.
4. ANSWER: 4 8
xy
5. ANSWER: 1
6. ANSWER: Simplify.
7. eSolutions
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ANSWER: 10
Page 1
ANSWER: Practice Test - Chapter 7
Simplify.
7. ANSWER: 10
8. ANSWER: 5
9. ANSWER: 12
10. ANSWER: 11. ANSWER: 9
12. ANSWER: 1000
13. ANSWER: 243
14. ANSWER: Solve each equation.
15. ANSWER: 3
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16. ANSWER: Page 2
Solve each equation.
15. ANSWER: Practice
Test - Chapter 7
3
16. ANSWER: 5
17. ANSWER: 6
Express each number in scientific notation.
18. 0.00021
ANSWER: −4
2.1 × 10
19. 58,000
ANSWER: 4
5.8 × 10
Express each number in standard form.
−5
20. 2.9 × 10
ANSWER: 0.000029
6
21. 9.1 × 10
ANSWER: 9,100,000
Evaluate each product or quotient. Express the results in scientific notation.
3
4
22. (2.5 × 10 )(3 × 10 )
ANSWER: 7
7.5 × 10
23. ANSWER: 6
2.2 × 10
24. ASTRONOMY The average distance from Mercury to the Sun is 35,980,000 miles. Express this distance in
scientific notation.
ANSWER: 3.598 × 10
7
Graph each function. Find the y-intercept, and state the domain and range.
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25. y = 2(5)
ANSWER: Page 3
24. ASTRONOMY The average distance from Mercury to the Sun is 35,980,000 miles. Express this distance in
scientific notation.
ANSWER: Practice Test - Chapter 7
7
3.598 × 10
Graph each function. Find the y-intercept, and state the domain and range.
x
25. y = 2(5)
ANSWER: y-intercept is 2
D = {all real numbers}
R = {y | y > 0}
26. y = –3(11)
x
ANSWER: y-intercept is −3
D = {all real numbers}
R = {y | y < 0}
27. y = 3x + 2
ANSWER: y-intercept is 2
D = {all real numbers}
R = {all real numbers}
Find the next three terms in each geometric sequence.
28. 2, −6, 18, …
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ANSWER: Page 4
y-intercept is 2
D = {all
real
numbers}7
Practice
Test
- Chapter
R = {all real numbers}
Find the next three terms in each geometric sequence.
28. 2, −6, 18, …
ANSWER: −54, 162, −486
29. 1000, 500, 250, …
ANSWER: 125, 62.5, 31.25
30. 32, 8, 2, …
ANSWER: 31. MONEY Lynne invested $500 into an account with a 6.5% interest rate compounded monthly. How much will
Lynne’s investment be worth in 10 years?
F $600.00
G $938.57
H $956.09
J $957.02
ANSWER: H
32. INVESTMENTS Shelly’s investment of $3000 has been losing value at a rate of 3% each year. What will her
investment be worth in 6 years?
ANSWER: $2498.92
Find the first five terms of each sequence.
33. ANSWER: 18, 14, 10, 6, 2
34. ANSWER: eSolutions Manual - Powered by Cognero
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