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Klio2033 [76]
3 years ago
13

Factorization of 3x^2+21x​

Mathematics
1 answer:
ycow [4]3 years ago
6 0

Answer:

3x(x+7)

Step-by-step explanation:

3 {x}^{2}  + 21x \\  = 3x(x + 7)

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Which equation involves a prime quadratic and cannot be solved by factoring? A. x2 + 5x − 4 = 0 B. x2 − x − 6 = 0 C. x2 + 3x − 4
Damm [24]

Answer:

Option A

Step-by-step explanation:

We can try to factorize all the options one by one.

For A:

x^{2} +5x-4\\=> x^{2}+4x+x-4\\=>x(x+4)+1(x-4)

We can see that the quadratic expression cannot be solved by factorization as the factors at the end of factorization are not equal in both brackets. So Option A is the correct answer for the given question.

Moreover we can also note that all the other quadratic expressions can be factorized ..

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Aidan bought a jacket on sale for $38.40. If the original price of the jacket was $64, what was the percent of the discount?
UkoKoshka [18]

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Step-by-step explanation:

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Answer:

1/2

Step-by-step explanation:

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2 years ago
A pencil and an eraser cost 1.10 together. if the pencil costs one dollar more than the eraser how much does the eraser cost
Kazeer [188]

1 pencil + 1 eraser = $1.10


Pencil cost $1 more than the eraser.

⇒ If we take away $1 from the total, both the pencil and the eraser will cost the same.

⇒ $1.10 - $1.00 = $0.10


Divide by 2 to find the cost of the eraser.

⇒$0.10 ÷ 2 = $0.05


Find the cost of the pencil, which is $1 more than the eraser.

⇒ $0.05 + $1 = $1.05


Answer: The eraser costs $0.05



8 0
2 years ago
A sheet metal company had 5 contracts last month. The contracts were worth $5600, $2800, $7450, 1900, and $8900. Materials, sala
viktelen [127]

Answer:

Step-by-step explanation:

Do percent Proportions

23,750           x                                        

               ______

______      100

5

Cross multiply

23,750×100= 2375000

5×x= 5x

2375000÷5+

idk sorry

7 0
2 years ago
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