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Ainat [17]
3 years ago
12

Help me out fast pleaseeeeeeeeeeeeeee

Mathematics
1 answer:
boyakko [2]3 years ago
8 0

Answer:

81 7/12

Step-by-step explanation:

75 5/12 - (-6 1/6)= 81 7/12

You might be interested in
(2/5) + ( -1/4). Show your work by using the “butterfly” method.
pashok25 [27]

Answer:

0.15

Step-by-step explanation:

Step 1: Make sure the bottom numbers (the denominators) are the same

Step 2: Add the top numbers (the numerators), put that answer over the denominator

Step 3: Simplify the fraction (if needed)

3 0
3 years ago
How many 3/4 cup servings are in 12 cups of cherries?
AveGali [126]

Answer:

16 serving.

Step-by-step explanation:

Given: 3/4 cup servings.

Now, computing the number of serving in 12 cups of cherries.

Using unitary method to solve.

∴ Number of serving= total\ cups \times number\ of\ serving\ per\ cup

Number of serving in one cup is \frac{4}{3}

Number of serving in 12 cups = 12\times \frac{4}{3} = 16 \ serving

Number of serving in 12 cups= 16\ serving

∴ There are 16 serving is possible in 12 cups of cherries.

8 0
3 years ago
The candy store is having 30% off sell. Emma is going to buy $7.50 worth of candy. How much will she pay after the discount
Angelina_Jolie [31]

Answer:

Emma will pay $5.25

Step-by-step explanation:

In order to find this, we first need to find the amount of the discount. We can do that by taking the overall amount and multiplying it by the percentage decrease.

$7.50 * 30% = $2.25

Now since we know the size of the discount, we can subtract it from the original cost.

$7.50 - $2.25 = $5.25

6 0
3 years ago
Read 2 more answers
Assume that both populations are normally distributed. ​a) Test whether mu 1 not equals mu 2 at the alpha equals 0.05 level of s
Radda [10]

Answer:

(16.2-14.1) -2.03 \sqrt{\frac{4.5^2}{19} +\frac{3.1^2}{19}} = -0.445

(16.2-14.1) +2.03 \sqrt{\frac{4.5^2}{19} +\frac{3.1^2}{19}} = 4.645

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".

n_1 = 19 sample size 1

n_2 = 19 sample size 2

\\bar X_1 = 16.2 sample mean for group 1

\\bar X_2 = 14.2 sample mean for group 2

s_1 = 4.5 sample deviation for group 1

s_2 = 3.1 sample deviation for group 2

Solution to the problem

For this case the confidence interval is given by:

(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}

And the degrees of freedom are given by:

df = n_1 +n_2 -2 = 19+19 -2= 36

We want a 95% of confidence o then the significance level is 1-0.95 =0.05 and \alpha/2 = 0.025 if we find a critical value in the t distribution with 36 degrees of freedom we got:

t_{cric} =2.03

And replacing we got:

(16.2-14.1) -2.03 \sqrt{\frac{4.5^2}{19} +\frac{3.1^2}{19}} = -0.445

(16.2-14.1) +2.03 \sqrt{\frac{4.5^2}{19} +\frac{3.1^2}{19}} = 4.645

5 0
3 years ago
How do you make a fraction like this: 72 3/16 into a whole number?
miss Akunina [59]

What you do is you take the denominator and you divide it into the numerator.

6 0
3 years ago
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