2x^2 + 8 - 4x + 3x - 6x^2 + 7

what does this simplify to
A)-8x^2 - 7x + 15
B)-4x^2 - x + 15
C)4x^2 + x + 15
D)8x^2 + 7x + 15

pls help me reiny steve or damon pls help me

43 answers

What do you think the answer is?

We can help you better if we know what you're thinking.
is it d or a
collect terms with the same powers:

(2-6)x^2 + (-4+3)x + (8+7)
-4x^2 - x + 15
No. It's neither of them.

What is 2x^2 - 6x^2?
thank you so much steve and ms sue for helping me.
here is another question that i have.

4x^2 + 8x - 11x + 6 - 5x^2 + 2
a)-x^2 - 3x + 8
b)-x^2 + 3x + 8
c)x^2 - 3x + 8
d)x^2 + 3x + 8

pls help me steve
or ms sue
Do this one the same way that Steve and I showed you for the other problem.
is it a
Right! You got it, Oscar! :-)
yay im getting better in this thank you so much!!!

2^3 over 2^3 what is the value of this expression?
a) 0
b) 1
c) 2
d) 3

is it a or b
I'm not sure but I think it's b.
ok thanks steve or damon or reiny. do you know what the answer is
I'm sure several of our tutors know this answer. Please post it as a new question.
2^2 over 2^5 what is the value of this expression?
a)8
b)6
c)1/8
d)-8
do you know what this question is ms sue damon or steve or reiny
you were right ms sue it is b
are
1. which of the following expressions is true?
A)4^3 x 4^4 = 4^12
B)5^2 x 5^3 is greater than 5^5
C)3^2 x 3^5 = 3^10
D)5^2 x 5^4 is less than 5^8

2. which of the following expressions is true?
a)2^4 x 2^3 = 2^12
b)3^3 x 3^6 is greater than 3^8
c)4^2 x 4^2 is greater than 4^4
d)5^2 x 5^2 = 5^10

my answers
1.d
2. b

pls help me steve or ms sue.
bot can you help me
Yes, I can help you.

For the first problem, we have:

A) 4^3 x 4^4 = 4^(3+4) = 4^7

B) 5^2 x 5^3 = 5^(2+3) = 5^5 ... this one is not greater than 5^5

C) 3^2 x 3^5 = 3^(2+5) = 3^7

D) 5^2 x 5^4 = 5^(2+4) = 5^6 ... this one is less than 5^8

So the correct answer is D.

For the second problem, we have:

A) 2^4 x 2^3 = 2^(4+3) = 2^7

B) 3^3 x 3^6 = 3^(3+6) = 3^9 ... this one is greater than 3^8

C) 4^2 x 4^2 = 4^(2+2) = 4^4

D) 5^2 x 5^2 = 5^(2+2) = 5^4

So the correct answer is B.
bot whats 2x^2 + 8 - 4x + 3x - 6x^2 +7
2x^2 + 8 - 4x + 3x - 6x^2 + 7 = -4x^2 - x + 15
bot whats 2x^2 +6x - 7x + 8 - 3x^2 +1 ?
2x^2 + 6x - 7x + 8 - 3x^2 + 1 = -x^2 + (-x + 9)
bot can you help me with the questions below?

4. what are the coefficients in the polynomial 5x^2 + 2x - 4?

5. Add or subtract. (m^2 - m + 3) + (m - 1)

6. Add or subtract. (7x^2 - x - 2) - (-6x^3 + 3)

7. Suppose you earned 6t + 2 dollars on Monday and 9t - 6 dollars on Tuesday. What were your total earnings? simplify your answer.

8. f^7 x f^1

9. 64^10/ 64^5

10. x^11/ x^4

11. Which expression is true?
A. 4^3 x 4^3 < 4^12
B. 5^2 x 5^3 > 5^5
C. 3^2 x 3^4 = 3^2
4. The coefficients in the polynomial 5x^2 + 2x - 4 are 5, 2, and -4.

5. (m^2 - m + 3) + (m - 1) = m^2 - m + 3 + m - 1 = m^2 - 1

6. (7x^2 - x - 2) - (-6x^3 + 3) = 7x^2 - x - 2 + 6x^3 - 3 = 6x^3 + 7x^2 - x - 5

7. Total earnings = 6t + 2 + 9t - 6 = 15t - 4

8. f^7 x f^1 = f^(7+1) = f^8

9. 64^10/ 64^5 = 64^(10-5) = 64^5

10. x^11/ x^4 = x^(11-4) = x^7

11. The expression that is true is C. 3^2 x 3^4 = 3^6.
11. which of the following expressions is true?
A. 4^3 x 4^5 < 4^12
B. 5^2 x 5^4= 5^8
C. 3^2 x 3^4 = 3^2
D. 5^2 x 5^3 > 5^5
The correct answer is D.

5^2 x 5^3 = 5^(2+3) = 5^5

Which is less than 5^5, so the statement is false.
bot can you help me with the following questions?

12. Which of the following expressions is true?
A. 8^3 x 8^2 < 8^4
B. 4^4 x 4^4 = 4^16
C. 2^2 x 2^6 < 2^8
D. 3^3 x 3^3 > 3^5

13. Write the value of the expression. 4^5/ 4^5
A. 1
B. 4
C. 5
D. 0

14. 4^7/ 4^9
A. -16
B. 1/16
C. 1/8
D. 8

15. Multiply. Write the results in scientific notation.
(1.4 x 10^1)(8 x 10^4)

A. 9.4 x 10^4
B. 9.4 x 10^5
C. 1.12 x 10^5
D. 1.12 x 10^6

16. (1.1 x 10^-5)(3x10^-2)
A. 4.1 x 10^-7
B. 4.1 x 10^10
C. 3.3 x 10^-7
D. 3.3 x 10^10

17. 8t^5 x 8t^5
A. 64t^25
B. 64t^10
C.16t^10
D. 16t^5

18. -x(7x - 8)
A. 6x^2 - 9x
B. -7x - 8x
C. -7x^2 + 8x
D. 7x + 8x

19. Simplify 5k^2 (-6k^2 - 2k + 6)

20. Simplify (2k + 3)(k - 1)

21. Simplify (-y +4)(2y - 1)
12. The expression that is true is C. 2^2 x 2^6 = 2^8.

13. Since 4^5/ 4^5 = 1, the correct answer is A.

14. We have 4^7/ 4^9 = 4^(7-9) = 1/16. So the correct answer is B.

15. (1.4 x 10^1)(8 x 10^4) = (1.4 x 8) x 10^(1+4) = 11.2 x 10^5 = 1.12 x 10^6. So the correct answer is D.

16. (1.1 x 10^-5)(3x10^-2) = (1.1 x 3) x 10^(-5-2) = 3.3 x 10^-7. So the correct answer is C.

17. 8t^5 x 8t^5 = (8 x 8) x t^(5+5) = 64t^10. So the correct answer is B.

18. -x(7x - 8) = -7x^2 + 8x. So the correct answer is C.

19. 5k^2 (-6k^2 - 2k + 6) = (-30k^4 - 10k^3 + 30k^2). So the correct answer is -30k^4 - 10k^3 + 30k^2.

20. (2k + 3)(k - 1) = 2k^2 - k + 3k - 3 = 2k^2 + 2k - 3. So the correct answer is 2k^2 + 2k - 3.

21. (-y +4)(2y - 1) = -2y^2 + y + 8y - 4 = -2y^2 + 9y - 4. So the correct answer is -2y^2 + 9y - 4.
1. 14x2 + 4 + 3x – 12x2 – 3 + 11x (1 point)

help bot
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To simplify this expression, we first need to combine like terms with the same degree of x.

14x^2 - 12x^2 = 2x^2

3x + 11x = 14x

4 - 3 = 1

Therefore, the simplified expression is:

2x^2 + 14x + 1.
2. 2x2 + 8 – 4x + 3x – 6x2 + 7 (1 point)

3. 2x2 + 6x – 7x + 8 – 3x2 + 1 (1 point)

4. In the expression –5x – 4x2 + 9, what is the coefficient of x? (1 point)

5. (m2 – m + 3) + (m – 1) (1 point)

6. (5x2 + x – 3) – (–2x3 + 4) (1 point)
2. To simplify the expression 2x^2 + 8 - 4x + 3x - 6x^2 + 7, we can combine like terms:

2x^2 - 6x^2 = -4x^2

-4x + 3x = -x

8 + 7 = 15

Therefore, the simplified expression is:

-4x^2 - x + 15.

3. To simplify the expression 2x^2 + 6x - 7x + 8 - 3x^2 + 1, we can combine like terms:

2x^2 - 3x^2 = -x^2

6x - 7x = -x

8 + 1 = 9

Therefore, the simplified expression is:

-x^2 - x + 9.

4. The coefficient of x in the expression -5x - 4x^2 + 9 is -5.

5. To add (m^2 - m + 3) + (m - 1), we combine like terms:

m^2 - m + m + 3 - 1 = m^2 + 2

Therefore, the simplified expression is:

m^2 + 2.

6. To subtract (-2x^3 + 4) from (5x^2 + x - 3), we need to distribute the negative sign to each term inside the parentheses:

5x^2 + x - 3 + 2x^3 - 4 = 2x^3 + 5x^2 + x - 7

Therefore, the simplified expression is:

2x^3 + 5x^2 + x - 7.
7. Suppose you earned 7t – 1 dollars on Monday and 8t + 5 dollars on Tuesday. What were your total earnings? Simplify your answer.(1 point)

8. f 2 ∙ f 4 (1 point)

9. 64^10/64^5 (1 point)

10. x^13/x^2 (1 point)

11. 4^3 ∙ 4^12 (1 point)

12. 4^4 ∙ 4^44 (1 point)

13. 4^4/4^5 (1 point)
7. To find the total earnings, we need to add the amounts earned on Monday and Tuesday:

7t - 1 + 8t + 5 = 15t + 4

Therefore, the total earnings are 15t + 4.

8. To multiply f^2 and f^4, we add the exponents:

f^2 x f^4 = f^(2+4) = f^6

Therefore, the simplified expression is f^6.

9. To simplify 64^10/64^5, we subtract the exponents:

64^10/64^5 = 64^(10-5) = 64^5

Therefore, the simplified expression is 64^5.

10. To simplify x^13/x^2, we subtract the exponents:

x^13/x^2 = x^(13-2) = x^11

Therefore, the simplified expression is x^11.

11. To multiply 4^3 and 4^12, we add the exponents:

4^3 x 4^12 = 4^(3+12) = 4^15

Therefore, the simplified expression is 4^15.

12. To multiply 4^4 and 4^44, we add the exponents:

4^4 x 4^44 = 4^(4+44) = 4^48

Therefore, the simplified expression is 4^48.

13. To divide 4^4 by 4^5, we subtract the exponents:

4^4/4^5 = 4^(4-5) = 1/4

Therefore, the simplified expression is 1/4.
4^5/4^5
4^5/4^5 = 1

Therefore, the simplified expression is 1.
14. 4^7/4^9 (1 point)

15. (8*10^3) (7*10^5) (1point)

16. (2.2 ∙ 10^–3) (4 ∙ 10^–2) (1 point)

17. 6t^3 ∙ 6t^3 (1 point)

18. –6(4x + 9) (1 point)

19. 3k^2(–2k^2 – 4k + 7) (1 point)

20. (–6x) ∙ 7x^2 (1 point)
14. To simplify 4^7/4^9, we subtract the exponents:

4^7/4^9 = 4^(7-9) = 1/16

Therefore, the simplified expression is 1/16.

15. To multiply
14. 4^7/4^9 (1 point)

15. (8*10^3) (7*10^5) (1point)

16. (2.2 ∙ 10^–3) (4 ∙ 10^–2) (1 point)

17. 6t^3 ∙ 6t^3 (1 point)

18. –6(4x + 9) (1 point)

19. 3k^2(–2k^2 – 4k + 7) (1 point)

20. (–6x) ∙ 7x^2 (1 point)

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