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Anna35 [415]
3 years ago
12

Factor 2k^2 - k - 3 A: (2k-3)(k+1) B: (k-1)(2k+3) C: (2k-1)(k+3) D: (k-3)(2k+1)

Mathematics
1 answer:
Art [367]3 years ago
4 0

Answer:

A

Step-by-step explanation:

Given

2k² - k - 3

Consider the factors of the product of the k² term and the constant term which sum to give the coefficient of the k- term.

product = 2 × - 3 = - 6 and sum = - 1

The factors are + 2 and - 3

Use these factors to split the k- term

2k² + 2k - 3k - 3 ( factor the first/second and third/fourth terms )

= 2k(k + 1) - 3(k + 1) ← factor out (k + 1) from each term

= (2k - 3)(k + 1) → A

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Answer: 0.8490

Step-by-step explanation:

Given :  The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.0 inches and a standard deviation of 0.9 inches.

i.e. \mu=30 and \sigma=0.9

Let x denotes the lengths of aluminum-coated steel sheets.

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3 0
3 years ago
Five times the number of test tubes in a school’s chemistry lab exceeds three times the number of beakers it has by 660. The sum
Usimov [2.4K]
<span>5t=3b+660....and ... 2t+5b=450

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(6b+1320)/5+5b=450 making all have common denominator..

6b+1320+25b=2250

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t=150</span>
4 0
3 years ago
Is the number rational or irrational?
lapo4ka [179]
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2. rational: √9 = 3

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3 years ago
(n/‒7) + 3 = ‒2<br> explain it
iris [78.8K]

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Step-by-step explanation:

Solve for n by simplifying both sides of the equation. Then isolating the variable.

J’espère que ça aide.

5 0
3 years ago
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Stels [109]

Answer:

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Step-by-step explanation:

The line of reflection will be a parallel line midway between y = - 3 and y = 5

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line of reflection is y = 1

8 0
2 years ago
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