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3 years ago

(Math Help Quick Lots of points please thanks)

Mathematics

2 answers:

Elden [556K]3 years ago

8 0

Answer:

E = {0, 1, 2, 3)

Step-by-step explanation:

Integer: a number with no decimal or fractional part, from the set of negative and positive numbers, including zero
< means less than
> means more than

E = {0, 1, 2, 3)

RUDIKE [14]3 years ago

4 0

E={y|y is an integer and -1<y<4}

Now here value of y is

$\\ \tt\hookrightarrow y\in(-1,4)$

$\\ \tt\hookrightarrow E=\{0,1,2,3\}$

Done

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Solve the following rational equation for x 5/8 = x/12 x=

kramer

Answer: x, 5/8=x^2/12

Step-by-step explanation: Simplify the matrix.

3 0

2 years ago

hunter has a total of $9.60 in dimes and nickels. let n be the number of nickels and d be the number of dimes. hunter knows ther

Vladimir79 [104]

9514 1404 393

Answer:

(n, d) = (56, 68)

Hunter has 56 nickels and 68 dimes.

Step-by-step explanation:

The equations can be solved by using the second equation to substitute for d in the first equation.

10(n +12) +5n = 960

120 +15n = 960 . . . . . . . eliminate parentheses

15n = 840 . . . . . . . . . . . . subtract 120

n = 56 . . . . . . . . . . . . . . . divide by 15

d = 56 +12 = 68 . . . . . . . find d

The solution is n = 56, d = 68. This means Hunter has 56 nickels and 68 dimes.

_____

The meaning of the solution comes from the definitions of the variables.

8 0

3 years ago

Why is -3 an integer?

Lera25 [3.4K]

For example, -7 is an integer, so it is also a rational and a real number. The square root of 2 is an irrational number, so it is also a real number.

5 0

3 years ago

Read 2 more answers

Bridget needs an actor actor is offering her services for initial $250 in addition to $40 per day actor beers offering her servi

Neporo4naja [7]

Answer:it will take 9 days for both actors to charge the same amount.

Step-by-step explanation:

Let x represent the number of days it will take the cost of hiring either actor A or actor B to be the same.

Let y represent the cost of hiring actor A for x days.

Let z represent the cost of hiring actor B for x days.

Actor A is offering her services for initial $250 in addition to $40 per day. It means that

y = 250 + 40x

Actor B is offering her services for an initial $160 in addition to $50 per day. It means that

z = 160 + 50x

To determined the number of days when both costs would be the same, we would equate equation y to equation z. It becomes

250 + 40x = 160 + 50x

50x - 40x = 250 - 160

10x = 90

x = 90/10 = 9

4 0

3 years ago

It appears that people who are mildly obese are less active than leaner people. One study looked at the average number of minute

NemiM [27]

Answer:

a) 10.93% probability that the mean number of minutes of daily activity of the 5 mildly obese people exceeds 420 minutes.

b) 99.22% probability that the mean number of minutes of daily activity of the 5 lean people exceeds 420 minutes.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean $\mu$ and standard deviation $\sigma$ , a large sample size can be approximated to a normal distribution with mean $\mu$ and standard deviation $\frac{\sigma}{\sqrt{n}}$ .

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Mildly obese

Normally distributed with mean 373 minutes and standard deviation 67 minutes. So $\mu = 373, \sigma = 67$

A) What is the probability that the mean number of minutes of daily activity of the 5 mildly obese people exceeds 420 minutes?

So $n = 5, s = \frac{67}{\sqrt{5}} = 29.96$

This probability is 1 subtracted by the pvalue of Z when X = 410.

$Z = \frac{X - \mu}{s}$

$Z = \frac{410 - 373}{29.96}$

$Z = 1.23$

$Z = 1.23$ has a pvalue of 0.8907.

So there is a 1-0.8907 = 0.1093 = 10.93% probability that the mean number of minutes of daily activity of the 5 mildly obese people exceeds 420 minutes.

Lean

Normally distributed with mean 526 minutes and standard deviation 107 minutes. So $\mu = 526, \sigma = 107$