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4 years ago

What is 3/4 + 1/2 - 5/8

Mathematics

2 answers:

Paraphin [41]4 years ago

6 0

5/8 is your answer. Hope this helps :)

Arisa [49]4 years ago

4 0

The common denominator for the numbers 4, 2 and 8 is 8.
This means we have to make 3/4 and 1/2 have the denominator of 8.

To get from 4 to 8 is to multiply by 2 and vice versa. This leads to 3/4 turning to 6/8 and 1/2 to 4/8.

The question now is...
6/8 + 4/8 - 5/8
If you calculate the question now it would equal to 5/8 because 6+4-5 equals 5.

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The volume of a fish tank is 60 cubic feet. If the density is 0.3 fish over feet cubed, how many fish are in the tank? 200 9 100

FinnZ [79.3K]

Answer:

There are 18 fish in the fish tank.

Step-by-step explanation:

The volume of a fish tank is 60 cubic feet: V = 60 ft³.

The density is 0.3 fish over feet cubed. d = 0.3 fish/ft³

We can find the number of fish using proportions. The required conversion factor is 0.3 fish/ft³. The number of fish is:

60 ft³ × (0.3 fish/ft³) = 18 fish

There are 18 fish in the fish tank.

5 0

3 years ago

8* x + y + y; use x=9, and y = 10

katrin [286]

Answer:

Step-by-step explanation:

8* x + y + y

Where

x=9, and y = 10

Solution=8×9+10+10

=72+20

=92.

So the answer is 92

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3 years ago

Read 2 more answers

Two whole numbers have a least common multiple of 30.

Makovka662 [10]

Yes it is 3, and 10 : )

3 0

3 years ago

A realtor would like to create a 95% confidence interval for the average price of a house in Franklin County, Ohio. To accomplis

VMariaS [17]

Answer:

$320128-1.96\frac{50324}{\sqrt{529}}=315839.52$

$320128+1.96\frac{50324}{\sqrt{529}}=324416.48$

So on this case the 95% confidence interval would be given by (315839.52;324416.48)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=320128$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=50324$ represent the population standard deviation

n=529 represent the sample size

Solution to the problem

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that $z_{\alpha/2}=1.96$

Now we have everything in order to replace into formula (1):

$320128-1.96\frac{50324}{\sqrt{529}}=315839.52$

$320128+1.96\frac{50324}{\sqrt{529}}=324416.48$

So on this case the 95% confidence interval would be given by (315839.52;324416.48)

8 0

3 years ago

Ms.Groves has trays of paint for students in her art class.each tray has 5 colors.one of the colors is purple.what fraction of t

seropon [69]

<span>So we need to find the fraction of many times does purple show up in 20 trays in which every tray has 5 colors. To find the answer we need to find the overall number of all colors and that is 20 trays * 5 colors and that equals to 100 colors. So purple shows 20 times and 20/100 is 1/5 when we simplify the fraction. </span>

4 0

3 years ago

Read 2 more answers