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drek231 [11]
3 years ago
8

Harry is trying to solve the equation y = 2x^2 − x − 6 using the quadratic formula. He has made an error in one of the steps bel

ow. Find the step where Harry went wrong.

Mathematics
1 answer:
Bond [772]3 years ago
4 0
He made a mistake in step #2. It seemed to be a trivial mistake because it involved signs, but it still had a great impact. Since step#2, his solution was already wrong.

Instead of
(-1)²-4(2)(-6) = 1 + 48 = 49

What he did is
(-1)²-4(2)(-6) = -1 + 48 = 47
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A newspaper carrier can deliver 420 papers in eight hours. At this rate, how many newspapers can the carrier deliver in 6 hours?
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315 newspapers in 6 hours

Step-by-step explanation:

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3 years ago
A store is hoping an advertising campaign will increase their number of customers by 30%. They currently have about 80 customers
leonid [27]

Answer:

There will be 104 customers a day, after advertising campaign

Step-by-step explanation:

Current number of customers in a day in shop = 80

After advertising campaign, the customers will increase = 30%

So, new customers will be:

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30\% \  of \ 30\\=\frac{30}{100}*80\\=24

Now, add 24 to current 80 customers.

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8 0
3 years ago
Solve for d.
r-ruslan [8.4K]
5d + 2(2 - d) = 3(1 + d) + 1
5d + 2(2) - 2(d) = 3(1) + 3(d) + 1
5d + 4 - 2d = 3 + 3d + 1
5d - 2d + 4 = 3d + 3 + 1
3d + 4 = 3d + 4
<u>-3d       -3d        </u>
       4 = 4
       d = 0

4 0
3 years ago
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