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zmey [24]
3 years ago
14

Which is an

Mathematics
1 answer:
Andreyy893 years ago
5 0
(Answer 2,770) (estimation: 3,000)
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Imagine you are teaching a younger student how to factor. Describe in full sentences what you would say to teach the young stude
djyliett [7]

Answer:

x^2+ 4x - 21 =(x-3)(x+7)

Step-by-step explanation:

To factor the trimonial: x^2+ 4x - 21, we follow these steps:

Step 1: Multiply the first and last term

-21 \times x^2=-21x^2

Step 2: List out product factors of the term derived above

-21=-1 \times 21\\ -21=-3 \times 7\\-21=3 \times -7\\-21=1 \times -21

Step 3: Determine which of the factors sum up to the middle term 4x

The required product is: -3 and 7

Therefore: -3x+7x=4x

Step 4: Replace the middle term by the expression derived in step 3 and factorize.

x^2+ 7x -3x- 21\\=x(x+7)-3(x+7)\\=(x-3)(x+7)

3 0
3 years ago
Please help and thank you!
bogdanovich [222]

the answer is 13 :))
4 0
2 years ago
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Simon used 3 pears and 9 apples to make a fruit salad. What is the ratio of the number of pears to the number of apples in the f
Yanka [14]

Answer:

  1 : 3

Step-by-step explanation:

pears : apples = 3 : 9 = 1 : 3

___

A common factor of 3 can be removed from each number in the ratio to reduce it to lowest terms.

3 0
3 years ago
In the diagram what is m
Virty [35]
The diagram for m<VSR is 80°
6 0
3 years ago
Someone help ASAP<br> serious answers only or i will report
nadezda [96]
T represents hours, so if c(1.5)=c(t) as it mentioned in the problem, then 1.5 equals hours, and c represents cost, so if cost + time equals nine then I think it's a
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