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2 years ago

I need to know how to solve this algebra problem

Mathematics

2 answers:

yan [13]2 years ago

4 0

8(x2+2x-8)
8(x2+4x-2x-8)
8[(x2+4x]-(2x-8)]
8[x(x+4)-2(x+4)]

8(x-2)(x+4) is your final answer !!!!

Cerrena [4.2K]2 years ago

3 0

Wait can you check if this is right: 8(x^2 + 2x - 8)
if that’s correct, this is the explanation:
first look at all of your terms: 8x^2, 16x, and 64.
find the greatest common factor which is 8 (because all of them have a factor of 8)
factor the 8 out of all of the terms and put an 8 outside of the parenthesis.
you will end up with 8(x^2 + 2x - 8)

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3 years ago

Read 2 more answers

A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced.

zzz [600]

Answer:

$CI=(66.54,78.46)$

Step-by-step explanation:

Given : A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced. The mean yield of the 10 batches is 72.5% and the standard deviation is 5.8%. Assume the yields are independent and approximately normally distributed.

To find : A 99% confidence interval for the mean yield when the new catalyst is used ?

Solution :

Let X be the yield of the batches.

We have given, n=10 , $\bar{X}=72.5\%$ , s=5.8%

Since the size of the sample is small.

We will use the student's t statistic to construct a 995 confidence interval.

$\bar X\pm t_{n-1,\frac{\alpha}{2}}\frac{s}{\sqrt n}$

From the t-table with 9 degree of freedom for $\frac{\alpha}{2}=0.005$

$t_{n-1,\frac{\alpha}{2}}=t_{9,0.005}$

$t_{n-1,\frac{\alpha}{2}}=3.250$

The 99% confidence interval is given by,

$CI=72.5 \pm 3.25\frac{5.8}{\sqrt{10}}$

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3 years ago

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