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n200080 [17]
4 years ago
13

I need some help understanding proofs. I just don't get it! Can anyone refer me to a tutor or help me? It might be a long term t

hing..
Mathematics
2 answers:
Ne4ueva [31]4 years ago
8 0
Try Khan Academy It works wonders.
Annette [7]4 years ago
5 0
The biggest thing<span> you </span>can<span> do to improve your SAT Critical Reading score is to focus ... Sometimes when you read a passage, you </span>may get<span> confused by </span>certain<span> words, ... While you </span>don't need<span> to know all the details, you must know the main idea, which ... Let </span>me<span> add a few additional steps that </span>will help<span> you do your best on the ...</span>
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A ski lodge charges $26 per day for a pass and $1.50 for every ski lift ride. A second ski
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Step-by-step explanation:

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3 years ago
Please help me with algebra part B and C. attachment below. Will mark as brainslist. 25 points.
miv72 [106K]

Answer:

C. (-7x+60)(x+4)

Step-by-step explanation:

Consider the expression -7x^2+32x+240.

First, note that

a=-7\\ \\b=32\\ \\c=240

Find the discriminant

D=b^2-4ac=32^2-4\cdot (-7)\cdot 240=1,024+6,720=7,744\\ \\\sqrt{D}=\sqrt{7,744}=88

Now,

x_1=\dfrac{-b+\sqrt{D}}{2a}=\dfrac{-32+88}{2\cdot (-7)}=-4\\ \\x_2=\dfrac{-b-\sqrt{D}}{2a}=\dfrac{-32-88}{2\cdot (-7)}=\dfrac{60}{7}

Write the factored form:

-7x^2+32x+240=-7(x-(-4))\left(x-\dfrac{60}{7}\right)=(x+4)(-7x+60)

8 0
3 years ago
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