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Alika [10]
3 years ago
5

5 times a number is 14 less than the square of that number. Find the negative solution.

Mathematics
1 answer:
ryzh [129]3 years ago
4 0
The answer is 7

steps:
7*5=35
7 squared is 49
49-35=14
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If a train travels at the speed of 100 km how far will it travel in half an hour
choli [55]

Answer:

50 kilometers

Step-by-step explanation:

If it travels 100 in an hour, it would travel 50 in half

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The distribution of heights for adult men in a certain population is approximately normal with mean 70 inches and standard devia
KengaRu [80]

Answer:

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12]

Step-by-step explanation:

I beleive those options corresponds to another question, i will ignore them. We want to know an interval in which the probability that a height falls there is 0.8.

In such interval, the probability that a value is higher than the right end of the interval is (1-0.8)/2 = 0.1

If X is the distribuition of heights, then we want z such that P(X > z) = 0.1. We will take W, the standarization of X, wth distribution N(0,1)

W = \frac{X-\mu}{\sigma} = \frac{X-70}{4}

The values of the cumulative distribution function of W, denoted by \phi , can be found in the attached file. Lets call y = \frac{z-70}{4} . We have

0.1 = P(X > z) = P(\frac{X-70}{4} > \frac{z-70}{4}) = P(W > y) = 1-\phi(y)

Thus

\phi(y) = 1-0.1 = 0.9

by looking at the table, we find that y = 1.28, therefore

\frac{z-70}{4} = 1.28\\z = 1.28*4+70 = 75.12

The other end of the interval is the symmetrical of 75.12 respect to 70, hence it is 70- (75.12-70) = 64.88.

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12] .

Download pdf
8 0
3 years ago
At the school play abby handed out 250 programs and kim handed out 300 what is the ratio of the number of programs abby handed o
photoshop1234 [79]

A ratio shows us the number of times a number contains another number. The ratio of the number of programs Abby handed out to the number programs Kim handed out is 5/6.

<h3>What is a Ratio?</h3>

A ratio shows us the number of times a number contains another number.

At the school play Abby handed out 250 programs and Kim handed out 300. Therefore, the ratio of the number of programs Abby handed out to the number programs Kim handed out is,

Ratio = (Number of programs Abby handed out)/(Number of programs Kim handed out)

Ratio = 250 / 300 = 5/6

Hence, the ratio of the number of programs Abby handed out to the number programs Kim handed out is 5/6.

Learn more about Ratios:

brainly.com/question/1504221

#SPJ1

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2 years ago
How much more area does a large pizza with a 12 in. diameter have than a small pizza with an 8 in. diameter? Round your answer t
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I'm pretty sure its 87 in2 but don't trust me! lol
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Whatsthe defenition of hypotenuse
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Hypotenuse is the longest side of a right triangle. It is equal to the sum of the squares on the other two sides.
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