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Anuta_ua [19.1K]
3 years ago
5

How do you solve this?

Mathematics
2 answers:
Cerrena [4.2K]3 years ago
6 0
The method to solve this answer is fairly simple.
First, write out your brackets like so: (x )(x ), leaving a space for the number that you will use in this factorisation
Next, find two numbers that multiply to give you +20 (the integer), but also add to give you -9 (the coefficient of x). The two numbers are -4 and -5
Now, you can place the two numbers into the brackets to give you the factored form:
(x-4)(x-5)
We know this is correct because if you expand these brackets, you get your original expression (shown in the attached image)

maks197457 [2]3 years ago
5 0
The answer is  (x-5)(x-4)
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There are 90 seniors in a high school. 60 of the seniors take mathematics, 35 of them take science and 15 take both classes. How
zysi [14]

Answer: The answer is 10 students.

Step-by-step explanation: Well first you know 15 take both so you can just subtract 15 from one of the numbers because the same student does not need to be counted twice. I chose to do 35-15 which equals 20. Then you do 60+20 to get 80. Lastly you subtract 80 from 90 to get 10.

I'm gonna go ahead and say I may not be correct because I don't know everything, but I answered to my best ability and got 10.

4 0
3 years ago
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What is an equation of the line that passes through the points (4, 4) and (8, 1)?
geniusboy [140]

Answer: y = -3/4x + 7

Step-by-step explanation:

first find slope:

y2-y1 / x2 - x1

1-4 / 8-4

-3/4

now just plug the slope (m) into the equation of a line using one of the points to find the y intercept

ill use (8,1)

1 = (-3/4)(8) + b

now solve :)

1 = -6 + b

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3 0
3 years ago
Please help me I’ve asked this questions several times and I really need help with this I do not understand it at all
Ulleksa [173]

Answer:

(-5,-2)

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6 0
2 years ago
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Neporo4naja [7]

Answer:

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Step-by-step explanation:

The 2-point form of the equation of a line can be used for starters.

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  y = ((55 -57)/60)/((5 -6)/15)(x -8/20) +19/20 . . simplify a little

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8 0
3 years ago
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Cos4theta+cos2theta/ cos4theta-cos2theta= _____
vovangra [49]

\bf \textit{Sum to Product Identities} \\\\ cos(\alpha)+cos(\beta)=2cos\left(\cfrac{\alpha+\beta}{2}\right)cos\left(\cfrac{\alpha-\beta}{2}\right) \\\\\\ cos(\alpha)-cos(\beta)=-2sin\left(\cfrac{\alpha+\beta}{2}\right)sin\left(\cfrac{\alpha-\beta}{2}\right) \\\\[-0.35em] \rule{34em}{0.25pt}

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8 0
3 years ago
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