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Fudgin [204]
4 years ago
9

What is the value of x?

Mathematics
2 answers:
Yuliya22 [10]4 years ago
8 0

Answer:

As two angles are equal pf the two triangles , they are similar

Thus

40/x = 32/4

40/x = 8

x = 5

tatyana61 [14]4 years ago
3 0

Answer:

x=5cm

Step-by-step explanation:

according to the picture , those two triangles are similar triangles,

so their three sides should be proportional

then :

32/4=40/x

8=40/x

x=5

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find the probability that a data value picked at random from a normally distributed population will have a standard score that c
vodka [1.7K]
\mathbb P(Z

The empirical rule says that approximately 99.7% of any normal distributions falls within three standard deviations of the mean, which leaves 0.3% outside that range, and due to the distribution's symmetry, 0.15% to either side. This means

\mathbb P(Z
\mathbb P(|Z|

So

\mathbb P(Z

or about 99.9%.
4 0
4 years ago
Mr. Duc asked Perry to set up 450 chairs in a large hall. Perry puts 20 chairs in each row. He has already set up 15 rows of cha
Crank

Answer:

c. 150

Step-by-step explanation:

20 times 15 is 300

subtract 300 from 450

4 0
3 years ago
Read 2 more answers
There are 2 red, 3 blue, and 4 green marbles in a jar?<br><br> What does the ratio 4 to 9 represent?
MrMuchimi

Hello!

How many marbles are in the jar all together?

3 + 2 + 4 = 9

We also know that there are 4 green marbles in the job.

So, I would assume that the answer is;

Green Marbles : Total Marbles or Green Marbles to Total Marbles.

<em>waffletowne</em>

6 0
3 years ago
What is the value of the expression −x(y−8)2for x = -2 and y = 5?
Zolol [24]
Answer is 12
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3 0
4 years ago
A federal lobbyist wishes to survey residents of a certain congressional district to see what proportion of the electorate is aw
horrorfan [7]

Answer:

a. 385

b. 342

Step-by-step explanation:

To solve the problem we do the following:

The equation to calculate the sample size is:

n = (p)(q)(\frac{z}{E})^2

a)

We have the following data:

Since no estimate of proportion is given, we will assume: p = q = 0.5

We know that For 95% confidence, z = 1.96

Width = 0.10

Hence, the margin of error would be:

0.10 / 2 = 0.05

E = 0.05

And so we can calculate sample size:

n = (0.5)(0.5)(\frac{1.96}{0.05})^2

n = 385  

b)

We have the following data for this point:

p = 2/3

q = 1 - p

q = 1 - 2/3

q = 1/3

And so we can calculate sample size:

n = (2/3)(1/3)(\frac{1.96}{0.05})^2

n = 342

4 0
3 years ago
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