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natita [175]
3 years ago
15

Find the value of x. Round to the nearest degree.

Mathematics
2 answers:
boyakko [2]3 years ago
6 0
Did u forget to upload the picture?
Usimov [2.4K]3 years ago
4 0

Answer:

where is your questions figure

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A certain standardized test's math scores have a bell-shaped distribution with a mean of 530 and a standard deviation of 119. Co
kumpel [21]

Answer:

a) 68.2%

b) 31.8%

c) 2.3%

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 530

Standard Deviation, σ = 119

We are given that the distribution of math scores is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

a) P(test scores is between 411 and 649)

P(411 \leq x \leq 649)\\\\= P(\displaystyle\frac{411 - 530}{119} \leq z \leq \displaystyle\frac{649-530}{119})\\\\= P(-1 \leq z \leq 1)\\\\= P(z \leq 1) - P(z < -1)\\= 0.841 - 0.159 = 0.682 = 68.2\%

b) P(scores is less than 411 or greater than 649)

P(x < 411 < x, x > 649)\\=1 = P(411 \leq x \leq 649)\\=1 - 0.682\\=0.318 = 31.8\%

c) P(score greater than 768)

P(x > 768)

P( x > 768) = P( z > \displaystyle\frac{768 - 530}{119}) = P(z > 2)

= 1 - P(z \leq 2)

Calculation the value from standard normal z table, we have,  

P(x > 768) = 1 -0.977 = 0.023 = 2.3\%

5 0
3 years ago
Let t = 5. What is the value of (35 ÷ t) · 4?
lora16 [44]
Anwser: 28 :) 35 DEVIDED BY 5 IS 7 AND 7 X 4 IS 28
3 0
3 years ago
Read 2 more answers
2 and one half divide by one fourth
solmaris [256]
Hi,

2 \frac{1}{2}  \div  \frac{1}{4}   \\ 2 \frac{2}{4}  \div  \frac{1}{4}  = 10

Hope this helps.
r3t40
3 0
4 years ago
NEED HELP ASAP
balu736 [363]

Answer:

∠4 and ∠3

∠4 and ∠5

∠3 and ∠6

Step-by-step explanation:

A pair of angles is said to be supplementary when the 2 angles add up to give 180°.

Two right angles add up to give 180°. Also, if we have two angles on a straight line, their sum = 180°, according to the linear pair property.

Thus, since m< 3 is given as 90°, m<4 = 90°.

m<4 + m<3 = 180°.

Therefore, <4 and <3 are supplementary.

<4 and <5, <3 and <6 are both linear pairs, therefore they are also supplementary.

6 0
3 years ago
How many centimeters are there in 12 yards?
aliya0001 [1]

Answer:

Answer is 1097.28 cm

Step-by-step explanation:

prove me wrong

4 0
1 year ago
Read 2 more answers
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