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Studentka2010 [4]
3 years ago
5

You have $96 I. A savings account and you deposit an equal amount into your account each week. After 7 weeks the account holds $

201 wire an equation that represents the amount y ( in dollars) in the account after x weeks
Mathematics
1 answer:
Goshia [24]3 years ago
7 0

Answer:

201 = 7y +96

Step-by-step explanation

201 is your total ending balance

you have put in 96 so you have to account for that in the account and it tells you 7 weeks. what you dont know id how much the Y will be put in each of that seven weeks.

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A chemist examines 12 sedimentary samples for bromide concentraction. The mean bromide concentration for the sample date is 0.43
Umnica [9.8K]

Answer:

a) z = 1.645

b) Lower endpoint: 0.422cc/m³

Upper endpoint: 0.452 cc/m³

Step-by-step explanation:

Population is approximately normal, so we can find the normal confidence interval.

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

\alpha = \frac{1-0.9}{2} = 0.05

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

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645. This is the critical value, the answer for a).

Now, find 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.

M = 1.645*\frac{0.0325}{\sqrt{12}} = 0.015

The lower end of the interval is the sample mean subtracted by M. So it is 0.437 - 0.015 = 0.422cc/m³.

The upper end of the interval is the sample mean added to M. So it is 0.437 + 0.015 = 0.452 cc/m³.

b)

Lower endpoint: 0.422cc/m³

Upper endpoint: 0.452 cc/m³

4 0
3 years ago
Which expression is the result of factoring the expression below by taking out its greatest common factor?
Nat2105 [25]

Answer:

c is the correct answer

8 0
3 years ago
Anyone help with this??
Brut [27]

Answer:

bottom 2 shapes

Step-by-step explanation:

8 0
3 years ago
3/4w=9 what does w equal?
Studentka2010 [4]
3/4 w = 9

multiply by 4/3 on both sides

4/3 x 3/4 w = 9 x 4/3

w = 9 x 4/3

Simplify that

w = 3 x 4

w = 12

So your final answer is

\boxed{\bf{w=12}}
5 0
3 years ago
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What is the value of this expression when c = 3 and d = 7? 15+c2⋅d−c3
jonny [76]

Answer:

The answer to the equation is 48.

4 0
3 years ago
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