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storchak [24]
3 years ago
10

4 + b^2 x c / 2

Mathematics
1 answer:
statuscvo [17]3 years ago
4 0

Answer:

The answer is 80 just substitute the values for b and c

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0=9x-9x<br> no solution,<br> one solution,<br> infinite solutions
attashe74 [19]

Answer:

0 = 9x - 9x

0 = 0

This means it has infinite number of solutions.

Step-by-step explanation:

<h2>HOPE IT HELPS U!!!!</h2>
4 0
3 years ago
A researcher surveyed 220 residents of a city about the number of hours they
olga55 [171]

Answer:

Margin of error of 0.0485 hours.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this question:

\sigma = 0.35, n = 220

The margin of error is of:

M = z\frac{\sigma}{\sqrt{n}}

M = 1.96\frac{0.35}{\sqrt{200}}

M = 0.0485

Margin of error of 0.0485 hours.

5 0
3 years ago
I need help on this math problem ​
abruzzese [7]

Answer:

for the first one, simply add g(x) and h(x) :

x+3 + 4x+1 = 5x + 4

the second one, you would multiply them :

(x+3)(4x+1) = 4x^2 + 13x + 3

the last one, you would subtract :

(x+3)-(4x+1) = -3x + 2

and then substitute 2 for 'x' :

-3*2 + 2 = -6 + 2 = -4

8 0
3 years ago
Read 2 more answers
Heyy some one answer please &lt;3
34kurt
I think J
Explanation:
It’s saying x “her weight” is greater or equal to 112lbs or x “her weight” is less or equal to 128lbs
Hope this helps
6 0
2 years ago
Why is the product of 3\5 and 250 smaller than 250?
victus00 [196]
Because you are not multiplying 250 by a number larger than 1. If you multiply 250 by a number larger than 1 the product will be larger than 250. If you multiply 250 by a number less than 1 the product will be less than 250.

Hope that helps!
7 0
3 years ago
Read 2 more answers
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