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harkovskaia [24]
3 years ago
15

1) Sandra saves 12% of her salary for retirement. This year her salary was $3000 more than in the previous year, and she saved $

4,200. What was her salary in the previous year? i want to know the equation form
the topic is math 8 grade writing equations
Mathematics
2 answers:
OverLord2011 [107]3 years ago
8 0
Hello there.
<span>
1) Sandra saves 12% of her salary for retirement. This year her salary was $3000 more than in the previous year, and she saved $4,200. What was her salary in the previous year?
</span>
32,000 
svp [43]3 years ago
3 0
Given:
savings 12% of her salary.
savings $4,200
This year's salary: x + 3,000
Last year's salary: x

4,200 represents 12% of her salary.
4,200 / 12% =  35,000 is her salary this year.

x + 3,000 = 35,000
x = 35,000 - 3,000
x = 32,000  her salary last year.
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Answer:

a=-1,\ a=-5

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Step-by-step explanation:

<u>Equations</u>

We have two cases where some variable is required to be found such that some condition is met. The first case is about finding the value of a that complies:

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Rearranging

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3 years ago
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3 years ago
.In the Star Wars franchise, Yoda stands at only 66 centimeters tall. Suppose you want to see whether or not hobbits from the Lo
r-ruslan [8.4K]

Answer:

We conclude that the average height of hobbit is taller than Yoda.

Step-by-step explanation:

We are given that in the Star Wars franchise, Yoda stands at only 66 centimetres tall.

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<u><em /></u>

<u><em>Let </em></u>\mu<u><em> = average height of hobbit.</em></u>

So, Null Hypothesis, H_0 : \mu \leq 66 cm      {means that the average height of hobbit is shorter than or equal to Yoda}

Alternate Hypothesis, H_A : \mu > 66 cm      {means that the average height of hobbit is taller than Yoda}

The test statistics that would be used here <u>One-sample t test statistics</u> as we don't know about population standard deviation;

                     T.S. =  \frac{\bar X-\mu}{\frac{s}{\sqrt{n}}}  ~ t_n_-_1

where, \bar X = sample mean height = 80 cm

             s = sample standard deviation = 10.8 cm

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The value of t test statistics is 3.429.

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<em />

Therefore, we conclude that the average height of hobbit is taller than Yoda.

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3 years ago
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So, the area is \boxed{69y+23} and we're done.

3 0
2 years ago
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