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kenny6666 [7]
3 years ago
6

Find the area of a square with a diagonal of 8 cm.

Mathematics
1 answer:
Fofino [41]3 years ago
3 0

Answer:

To find the area of a square with only the diagonal known,

Square the diagonal and divide by 2:

8^2 = 64

64/2 = 32

The area is 32 cm^2

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78*78+30*30+20*20+72

7456

Step-by-step explanation:

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It looks equivalent.

Do the Pythagorean theorem on the triangle shown.
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2 years ago
How to solve for 40! / 10!30!
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3 0
3 years ago
The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year
puteri [66]

Answer:

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

Step-by-step explanation:

information given

\bar X=10.6 represent the sample mean  

\sigma=4.1 represent the population standard deviation

n=45 sample size  

\mu_o =12 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic

p_v represent the p value for the test

Hypothesis to test

We want to test if the true mean is less than 12, the system of hypothesis would be:  

Null hypothesis:\mu \geq 10  

Alternative hypothesis:\mu < 10  

The statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

Replacing the info given we got:

We can replace in formula (1) the info given like this:  

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

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3 years ago
Which ordered pair is a solution to the system of inequalities?<br> y&gt;−2 and x+y≤4
Kamila [148]

Answer:-2,-3

Step-by-step explanation:

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2 years ago
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