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yan [13]
3 years ago
6

Pls help me #7thgrademath

Mathematics
2 answers:
Dafna1 [17]3 years ago
7 0

Answer:

68 degrees

Step-by-step explanation:

180 - 90 = 90

90 - 22 = 68

The angle is 68

melamori03 [73]3 years ago
6 0

ovovovovovovovovoovovoovovovovovovoovovovo

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In an experiment, some diseased mice were randomly divided into two groups. One group was given an experimental drug, and one wa
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
What is the equation of a circle whose center is (2,0) and has a radius= 9?
Flauer [41]
The equation of a circle is: (x - h)² + (y - k)² = radius² where (h, k) is the center. Now just plug in your given information and simplify.

(x - 2)² + (y - 0)² = 9²

Your equation is:
(x - 2)² + y² = 81
6 0
3 years ago
Read 2 more answers
it takes a lady 26 minutes to travel 3 km by walking the first part at 6 km per hour and running the second part at 10 km per ho
Natasha2012 [34]

Answer:

78 meter 360meters 600 meters

3 0
3 years ago
How do we write equations in slop intercept form and how do we do this entire page?
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So,...
the slope intercept form is y = mx+b
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so to start you off, 4x - 9y = 2

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-4x            - 4y

-9y = -4y +2

divide both sides by -9

<u>-9y </u>= <u>-4y + 2</u>
 -9          -9

y = 4/9 x - 2/9

6 0
3 years ago
the total cost of the trio is $600 what is the compatable number to estimate the total cost of the field trip
saveliy_v [14]
Are there any other things that cost money that are in the equation?
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