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wlad13 [49]
2 years ago
5

Choose the Athat seems to be congruent to the given one. ΔABD=Δ

Mathematics
1 answer:
BaLLatris [955]2 years ago
6 0

Answer:

Triangle AEC

Step-by-step explanation:

Triangle ABD seems to be congruent to triangle AEC, because AD looks like it's equal to AC, AB looks like it's equal to AE, and BD looks like it's equal to EC, satisfying the criteria for an SSS congruence. Of course you could also go by the angles for SAS, SAS or AAS.

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What is the numerical expression for 30 more than 20
pantera1 [17]
30/20 is one way 30>20
4 0
3 years ago
450 high school freshmen were randomly selected for a national survey. Among survey participants, the mean grade-point average (
umka21 [38]

Answer:

The margin of error is of 0.01.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.7}{2} = 0.15

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.15 = 0.85, so Z = 1.037.

The margin of error is of:

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

Standard deviation was 0.21.

This means that \sigma = 0.21

Sample of 450:

This means that n = 450

What is the margin of error, assuming a 70% confidence level, to the nearest hundredth?

M = z\frac{\sigma}{\sqrt{n}}

M = 1.037\frac{0.21}{\sqrt{450}}

M = 0.01

The margin of error is of 0.01.

4 0
3 years ago
What's the square root of 1/36?
stich3 [128]
0.27... repeating :)
6 0
2 years ago
Two squares are attached to the sides of a quarter circle as shown.
olya-2409 [2.1K]
Area of a square is ; 10 * 10 = 100
We have 2 squares so total is 200.

Area of a circle is pi* r^2 = 3.14 * 100 = 314
But we have quarter of a circle so area will be 314/4 = 78.5

Total area of the shape is 200 + 78.5 = 278.5
6 0
2 years ago
Read 2 more answers
What is the mean of this data set? {6, 11, 5, 2, 7} Enter your answer as a decimal in the box.
Elenna [48]

Answer:

The mean is 6.2.

Step-by-step explanation:

The "mean" is the same thing as the "average". Essentially, the question is asking for the average of the numbers.

So:

Add up all of the terms. [6 + 11 + 5 + 2 + 7] = 31

You find the average by dividing the sum of the terms (31) by the number of terms (5).

31/5 = 6.2

The mean is 6.2.

I hope this helped! :)

4 0
2 years ago
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