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Sladkaya [172]
3 years ago
15

A medium sized apple has 70 calories. This is 10 calories less than 1\4 of the calories in an old westie chocolate bar.How many

calories are in the chocolate bar?
Mathematics
1 answer:
blondinia [14]3 years ago
5 0

Answer:

\boxed{320}

Step-by-step explanation:

    Let x = calories in chocolate bar

       ¼x = ¼ of the calories

¼x – 10 = 10 calories less than half the calories

¼x – 10 = 70

       ¼x = 80

          x = 320

There are \boxed{320} calories in the chocolate bar.

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damaskus [11]

Answer:

D)Yes, because the difference in the means in the actual experiment was more than two standard deviations from 0.

Step-by-step explanation:

We will test the hypothesis on the difference between means.

We have a sample 1 with mean M1=18.2 (drug group) and a sample 2 with mean M2=15.9 (no-drug group).

Then, the difference between means is:

M_d=M_1-M_2=18.2-15.9=2.3

If the standard deviation of the differences of the sample means of the two groups was 1.1 days, the t-statistic can be calculated as:

t=\dfrac{M_d-(\mu_1-\mu_2)}{s_{M_d}}=\dfrac{2.3-(0)}{1.1}=2.09

The critical value for a two tailed test with confidence of 95% (level of significance of 0.05) is t=z=1.96, assuming a large sample.

This is approximately 2 standards deviation (z=2).

The test statistict=2.09 is bigger than the critical value and lies in the rejection region, so the effect is significant. The null hypothesis would be rejected: the difference between means is significant.

4 0
3 years ago
Please help with this
GalinKa [24]
The answer is 20


Reason: so the W is 4 and the L is 6 so you do 4+4=8 then you do 6+6=12 then you add the two together and get 20
7 0
2 years ago
Which expression is equivalent to the expression below?
natulia [17]

Answer:

Step-by-step explanation:

3(7-22x) = 21-66x

3 0
2 years ago
May I ples have a little help pless <br> Simplify using the laws of exponents<br> [2^4/2^ 3]^5
xxMikexx [17]

\left[\dfrac{2^4}{2^3} \right]^5  \\\\\\=[2^{4-3}]^5\\\\=[2^1]^5\\\\=2^5\\\\=32

5 0
2 years ago
Solve the equation given<br> x = - 4.<br> 5 = x + 9
Igoryamba

Answer:

x=-4

Step-by-step explanation:

You wrote the answer in the question, so there is really no question.

How it helps :)

8 0
3 years ago
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