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uranmaximum [27]
3 years ago
8

You were able to purchase 5 gallons of gas for $19.85. How many gallons did you buy if you spent $47.64

Mathematics
2 answers:
antoniya [11.8K]3 years ago
7 0
12 Gallons

19.85/5=3.97
47.64/3.97=12
Fantom [35]3 years ago
7 0
Answer: You would have bought 12 gallons of water.
Each gallon is 3.97 
3.97 x 12= 47.64
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Good morning temperature is -15° but the afternoon the temperature raises by 20° right in addition expressions for the afternoon
stealth61 [152]

Answer:

+ 5°

Step-by-step explanation:

Given,

Good morning temperature = -15°

Raise in temperature = 20°

Afternoon temperature = -15° + 20°

           = + 5°

Hence, temperature in after noon is equal to + 5°.

7 0
3 years ago
A geologist examines 14 geological samples for iron concentration. The mean iron concentration for the sample data is 0.181 cc/c
kykrilka [37]

Answer:

The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.

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{1-0.9}{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

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{0.0318}{\sqrt{14}} = 0.0140

The lower end of the interval is the sample mean subtracted by M. So it is 0.181 - 0.0140 = 0.167 cc/m³.

The upper end of the interval is the sample mean added to M. So it is 0.181 + 0.0140 = 0.195 cc/m³.

The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.

3 0
3 years ago
5^2(7) <br> Pls solve I am stuck
AfilCa [17]

Answer:

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Step-by-step explanation:

hope this helps! just follow the order of operations. :)

3 0
3 years ago
What is -x2+2-1+6x2-4x2?
Alexandra [31]

Answer:

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Step-by-step explanation:

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a skier needs to buy new ski poles during a ski trip to Utah. the price of the poles is $24 and the sales tax is 4.7%. what is t
blagie [28]
24/4.7=x  x=5.1

24+x=what you want

24+5.1=29.1 there you go
4 0
3 years ago
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