Asked by Mittens
Please double check my answers? If they're wrong can you explain how to do it right? My math book doesn't have examples for all of these scenarios and I really don't want to fail this assignment. I don't normally look for help online, but I'm kinda desperate.
When I couldn't find a symbol for the exponent I used the ^
1. 18râ´ sâµ tⶠ÷ -3r² s t³ = ?
A. 6r²sâµt³
B. -6r²sâµt³
C. 6r²sâ´t³
D. -6r²sâ´t³
2. One day when Terry went to school the temperature outside was −15 degrees Fahrenheit. In Terry’s classroom the temperature was 68 degrees Fahrenheit. How many more degrees was it inside the building than outside?
A. +53 degrees
B. −53 degrees
C. +83 degrees
D. −83 degrees
3. Simplify (2x + 3)(x − 4) = ?
A. 2x² + 5x − 12
B. 2x² − 5x − 12
C. 2x² − 5x + 12
D. 2x² + 5x + 12
4. 7 x (−3) x(−2)² = ?
A. 48
B. −48
C. 84
D. −84
5. Simplify (3aⴠ− 2a² + 5a − 10) − (2aâ´ + 4a² + 5a − 2).
A. 5aâ´ + 4a³ + 3a² + 10a − 12
B. aⴠ− 4a³ − 2a² − 8
C. aⴠ− 6a² − 8
D. aâ´ + 2a² + 10a − 12
6. If Janice purchased three 24-ounce cans of motor oil for $10.80, how much did she pay per ounce?
A. $.45
B. $.15
C. $2.59
D. $3.60
7. (5 + 4 − 2) x( −2) = ?
A. 22
B. −22
C. 14
D. −14
8. Simplify (2e − 2f )(2f + 8) = ?
A. 4ef − 4f²
B. 4ef + 16e + 4f² + 16f
C. 4ef + 16e − 4f² − 16f
D. 4ef − 16e − 4f² − 16f
9. The expression 12xyz − 45 is a
A. monomial.
B. binomial.
C. trinomial.
D. constant.
10. What is the result if you divide −12x^8y^8 by 3xâ´y²?
A. −4x² yâ´
B. 4x 2yâ´
C. −4xâ´yâ¶
D. 4xâ´yâ¶
11. Simplify (x² + 16)(x² − 16) = ?
A. xⴠ− 32
B. xâ´ + 32
C. xⴠ− 256
D. xâ´ + 256
12. Simplify (15x² − 24x + 9)divided by (3x − 3) = ?
A. 5x + 3
B. 5x − 3
C. 5x + 13 with a −30 remainder
D. 5x − 13 with a −30 remainder
13. If the value of b is 7, then what is the value of the expression −3b² + 25 = ?
A. 172
B. 122
C. −122
D. 17
14. Simplify (−8q³râ´s²)² = ?
A. 64q^9r^16sâ´
B. −64q^9r^16sâ´
C. −64q^6r^8sâ´
D. 64q^6r^8sâ´
15. Simplify 12 − (−8) x 4 = ?
A. 16
B. 44
C. −20
D. 80
16. Simplify 2a²b³(4a² + 3ab² − ab)= ?
A. 8aâ´ bâµ + 3a³ bⵠ− 2a³ bâ´
B. 8aâ´ b³ + 6a³ bⵠ− 2a³ bâ´
C. 8aâ´ b³ + 6a³ bâµ + 2a³ bâ´
D. 8aâ´ bâµ + 3a³ bâµ + 2a³ bâ´
17. Simplify (3n − 2m)² = ?
A. 6n² − 12mn − 4m²
B. 9n² − 12mn − 4m²
C. 9n² + 12mn + 4m²
D. 9n² − 12mn + 4m²
18. Simplify (3 x 22) divided by 6 + [28 − (4)²] = ?
A. 32
B. 46
C. 23
D. 55
19. What is the result of dividing 48a³ + 32a² + 16a by 4a ?
A. 12a + 8
B. 12a² + 4a + 4
C. 12a² + 4a + 8
D. 12a² + 8a + 4
20. You can calculate the interest on a savings account by using this formula:
Interest = Principal Rate Time
If Mary deposits $275 in principal at an interest rate of 3.2 percent, how much interest will she earn
in one year?
A. $8.80
B. $88
C. $880
D. $18.80
My answers:
1. D
2. C
3. B
4. D
5. C
6. B
7. D
8. D
9. B
10. A or C
11. C
12. B
13. C
14. B
15. B
16. B
17. D
18. C
19. D
20. A
When I couldn't find a symbol for the exponent I used the ^
1. 18râ´ sâµ tⶠ÷ -3r² s t³ = ?
A. 6r²sâµt³
B. -6r²sâµt³
C. 6r²sâ´t³
D. -6r²sâ´t³
2. One day when Terry went to school the temperature outside was −15 degrees Fahrenheit. In Terry’s classroom the temperature was 68 degrees Fahrenheit. How many more degrees was it inside the building than outside?
A. +53 degrees
B. −53 degrees
C. +83 degrees
D. −83 degrees
3. Simplify (2x + 3)(x − 4) = ?
A. 2x² + 5x − 12
B. 2x² − 5x − 12
C. 2x² − 5x + 12
D. 2x² + 5x + 12
4. 7 x (−3) x(−2)² = ?
A. 48
B. −48
C. 84
D. −84
5. Simplify (3aⴠ− 2a² + 5a − 10) − (2aâ´ + 4a² + 5a − 2).
A. 5aâ´ + 4a³ + 3a² + 10a − 12
B. aⴠ− 4a³ − 2a² − 8
C. aⴠ− 6a² − 8
D. aâ´ + 2a² + 10a − 12
6. If Janice purchased three 24-ounce cans of motor oil for $10.80, how much did she pay per ounce?
A. $.45
B. $.15
C. $2.59
D. $3.60
7. (5 + 4 − 2) x( −2) = ?
A. 22
B. −22
C. 14
D. −14
8. Simplify (2e − 2f )(2f + 8) = ?
A. 4ef − 4f²
B. 4ef + 16e + 4f² + 16f
C. 4ef + 16e − 4f² − 16f
D. 4ef − 16e − 4f² − 16f
9. The expression 12xyz − 45 is a
A. monomial.
B. binomial.
C. trinomial.
D. constant.
10. What is the result if you divide −12x^8y^8 by 3xâ´y²?
A. −4x² yâ´
B. 4x 2yâ´
C. −4xâ´yâ¶
D. 4xâ´yâ¶
11. Simplify (x² + 16)(x² − 16) = ?
A. xⴠ− 32
B. xâ´ + 32
C. xⴠ− 256
D. xâ´ + 256
12. Simplify (15x² − 24x + 9)divided by (3x − 3) = ?
A. 5x + 3
B. 5x − 3
C. 5x + 13 with a −30 remainder
D. 5x − 13 with a −30 remainder
13. If the value of b is 7, then what is the value of the expression −3b² + 25 = ?
A. 172
B. 122
C. −122
D. 17
14. Simplify (−8q³râ´s²)² = ?
A. 64q^9r^16sâ´
B. −64q^9r^16sâ´
C. −64q^6r^8sâ´
D. 64q^6r^8sâ´
15. Simplify 12 − (−8) x 4 = ?
A. 16
B. 44
C. −20
D. 80
16. Simplify 2a²b³(4a² + 3ab² − ab)= ?
A. 8aâ´ bâµ + 3a³ bⵠ− 2a³ bâ´
B. 8aâ´ b³ + 6a³ bⵠ− 2a³ bâ´
C. 8aâ´ b³ + 6a³ bâµ + 2a³ bâ´
D. 8aâ´ bâµ + 3a³ bâµ + 2a³ bâ´
17. Simplify (3n − 2m)² = ?
A. 6n² − 12mn − 4m²
B. 9n² − 12mn − 4m²
C. 9n² + 12mn + 4m²
D. 9n² − 12mn + 4m²
18. Simplify (3 x 22) divided by 6 + [28 − (4)²] = ?
A. 32
B. 46
C. 23
D. 55
19. What is the result of dividing 48a³ + 32a² + 16a by 4a ?
A. 12a + 8
B. 12a² + 4a + 4
C. 12a² + 4a + 8
D. 12a² + 8a + 4
20. You can calculate the interest on a savings account by using this formula:
Interest = Principal Rate Time
If Mary deposits $275 in principal at an interest rate of 3.2 percent, how much interest will she earn
in one year?
A. $8.80
B. $88
C. $880
D. $18.80
My answers:
1. D
2. C
3. B
4. D
5. C
6. B
7. D
8. D
9. B
10. A or C
11. C
12. B
13. C
14. B
15. B
16. B
17. D
18. C
19. D
20. A
Answers
Answered by
Steve
Don't know where you copied the problems from, but the font got garbled for many of the problems. Anyway, trying to work past the font munging,
* means wrong
1. garbled, but probably B or D
2. C if outside is -15°F
3. B if it was (2x + 3)(x - 4)
4. garbled, but since 7 divides 84, probably C or D
5. garbled, but probably C - the coefficients seem good
6. B
7. D if it was (5+4-2)(-2)
*8. C if it was (2e-2f)(2f+8)
9. B
10. A or C, but too garbled
11. C if (x^2+16)(x^2-16) = x^4-256
12. B
13. C
*14. D garbled, but if the whole parenthesized expression is squared, then the coefficient must be 64, not -64. Also, (A) has q^9, which cannot be a square.
15. B
16. B
17. D
18. C
19. D
20. A
most look good; better double-check #8,14. If I interpreted them correctly, yo missed them.
* means wrong
1. garbled, but probably B or D
2. C if outside is -15°F
3. B if it was (2x + 3)(x - 4)
4. garbled, but since 7 divides 84, probably C or D
5. garbled, but probably C - the coefficients seem good
6. B
7. D if it was (5+4-2)(-2)
*8. C if it was (2e-2f)(2f+8)
9. B
10. A or C, but too garbled
11. C if (x^2+16)(x^2-16) = x^4-256
12. B
13. C
*14. D garbled, but if the whole parenthesized expression is squared, then the coefficient must be 64, not -64. Also, (A) has q^9, which cannot be a square.
15. B
16. B
17. D
18. C
19. D
20. A
most look good; better double-check #8,14. If I interpreted them correctly, yo missed them.
Answered by
Anonymous
Sorry. It looked normal when I first posted it. I don't know what happened. Thank you for the answer, though!
Answered by
Mittens
1. Was D
4. Was D
10. Was C
You were correct and I passed :) Thank you.
4. Was D
10. Was C
You were correct and I passed :) Thank you.
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