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Vlada [557]
4 years ago
8

Select the correct answer. What is the simplified form of this expression? (9x2 + 10x + 4) − (9x2 + 5x − 1) A. x2 + 5x + 5 B. x2

+ 15x + 3 C. 15x + 3 D. 5x + 5
Mathematics
2 answers:
Amiraneli [1.4K]4 years ago
5 0

Answer:

D. 5x + 5

Step-by-step explanation:

(9x^2 + 10x + 4) − (9x^2 + 5x − 1) =

Drop the first set of parentheses since they are unnecessary.

Distribute the negative sign to the left of the second set of parentheses. All signs inside the parentheses change.

= 9x^2 + 10x + 4 − 9x^2 - 5x + 1

Combine like terms.

= 9x^2 - 9x^2 + 10x - 5x + 4 + 1

= 5x + 4

Answer: D. 5x + 5

Alisiya [41]4 years ago
4 0

Step-by-step explanation:

9x2 + 10x + 4 - 9x2 - 5x + 1

5x + 5

Option D is the correct answer

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Montano1993 [528]

Answer:

0.15y

Step-by-step explanation:

0.2*0.75*y = 0.15y

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3 years ago
If a storm window is 315 square inches, what are the dimensions if the window is 6 inches higher than it is wide
viva [34]

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3 0
3 years ago
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andreyandreev [35.5K]

Answer:

3.5% of 20, (0.035)*20, and 7% of 10

Step-by-step explanation:

Converting the mixed number (3 1/2) to a decimal yields 3.5, so 3.5% of 20 is correct.

3 1/2 is not equal to 3 1/2%, so 3 1/2 * 20 is not correct.

Converting the percentage to a decimal yields .035 which makes .35 too large, so (0.35) * 20 is not correct.

Changing the percentage to a decimal yields .035, so (0.035) * 20 is correct.

If you divide 20 by 2, you get 10, and if you multiply 2 by 3 1/2, you get 7. The 2 remains part of the expression, so it is equal to 3 1/2 of 20.

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3 years ago
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kondor19780726 [428]
The answer is negative three halves minus one fifth
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