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3 years ago

Does it matter what order you add the numbers in the problem

Mathematics

1 answer:

EastWind [94]3 years ago

5 0

Answer:no it doesn’t matter what order you add the number.

Step-by-step explanation:

2 plus 3 equals 5

3 plus 2 equals 5

No matter the way you add 3 and 2, you still get 5

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I need help with this one question 8r - 5q = 3 solve for q how do i go about this

KATRIN_1 [288]

8r - 3 = 5q --> q = (8r - 3)/5

6 0

4 years ago

Suppose that the sitting back-to-knee length for a group of adults has a normal distribution with a mean of mu equals 24.4 in.

solong [7]

Answer:

$P(X \geq 26.6) = 0.0336$ , which is greater than 0.01. So a back-to-knee length of 26.6 in. is not significantly high.

Step-by-step explanation:

Problems of normally distributed samples are 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.

In this problem, we have that:

$\mu = 24.4, \sigma = 1.2$

In this problem, a value x is significantly high if:

$P(X \geq x) = 0.01$

Using these criteria, is a back-to-knee length of 26.6 in. significantly high?

We have to find the probability of the length being 26.6 in or more, which is 1 subtracted by the pvalue of Z when X = 26.6. So

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

$Z = \frac{26.6 - 24.4}{1.2}$

$Z = 1.83$

$Z = 1.83$ has a pvalue of 0.9664.

1 - 0.9664 = 0.0336

$P(X \geq 26.6) = 0.0336$ , which is greater than 0.01. So a back-to-knee length of 26.6 in. is not significantly high.

6 0

3 years ago

Ryan is selling his collection of Nike Air Jordans. He paid a total of $1720 for the 12 sneakers when they were new. When he goe

timofeeve [1]

Answer:

$1035

Step-by-step explanation:

50% of 1720 = 860

the fixed amount for the sneakers is $175

175+860=$1035

7 0

3 years ago

Iq scores are normally distributed with a mean of 100 and a standard deviation of 15 if one person is randomly selected what is

beks73 [17]

probability that the persons IQ falls between 110 and 130 is 0.2286 .

Step-by-step explanation:

Step 1: Sketch the curve.

The probability that 110<X<130 is equal to the blue area under the curve.

Step 2:

Since μ=100 and σ=15 we have:

P ( 110 < X < 130 )=P ( 110−100 < X−μ < 130−100 )

⇒ P ( (110−100)/15< (X−μ)/σ<(130−100)/15)

Since Z = (x−μ)/σ , (110−100)/15 = 0.67 and (130−100)/15 = 2 we have:

P ( 110<X<130 ) = P ( 0.67<Z<2 )

Step 3: Use the standard normal table to conclude that:

P ( 0.67<Z<2 )=0.2286

Therefore, probability that the persons IQ falls between 110 and 130 is 0.2286 .

4 0

3 years ago

The USDA pays schools for each lunch served. As of the 2014–15 school year, it paid $2.98 for each free lunch,

Anestetic [448]

Answer:

$32.80

Step-by-step explanation:

For this case we have that the total daily protein consumption is given by:

Now, we find the percentage corresponding to breakfast:

53g ---------> 100%

17g -----------> x

Where "x" represents the percentage of protein equivalent to breakfast:

Thus, at breakfast approximately 32.08% of the total protein should be consumed.

6 0

3 years ago