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soldier1979 [14.2K]
3 years ago
6

Evaluate the numerical expression 3+4x6

Mathematics
2 answers:
Sloan [31]3 years ago
7 0

Answer:

27

Step-by-step explanation:

3+4x6

We evaluate according to PEMDAS

The first thing we do is multiply

3+ 24

Then we add

27

AleksandrR [38]3 years ago
3 0
The answer is to it is 27
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Bethany is working her way through school. She works two part-time jobs for a total of 23 hours a week. Job A pays $5.70 per hou
Lady bird [3.3K]

Step-by-step explanation:

x = number of hours A

y = number of hours B

x + y = 23

5.7x + 7.1y = 143.7

from the first equation we get

x = 23 - y

this we use in the second

5.7×(23 - y) + 7.1y = 143.7

131.1 - 5.7y + 7.1y = 143.7

1.4y = 12.6

y = 12.6/1.4 = 9

x = 23 - y = 23 - 9 = 14

she worked 14 hours on job A and 9 hours on job B.

8 0
2 years ago
Find the slope of the line with these two pair of points (10,-5) and (8,-7)
matrenka [14]

Answer:

Step-by-step explanation:

8 0
3 years ago
-17-(-1)+2/3+(-1/2) or negative seventeen minus (negative one) plus two thirds plus (negative one half)
julia-pushkina [17]
-95/6 or negative ninety-five over six
3 0
3 years ago
Professor Halen teaches a College Mathematics class. The scores on the midterm exam are normally distributed with a mean of 72.3
lbvjy [14]

Answer:

14.63% probability that a student scores between 82 and 90

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 = 72.3, \sigma = 8.9

What is the probability that a student scores between 82 and 90?

This is the pvalue of Z when X = 90 subtracted by the pvalue of Z when X = 82. So

X = 90

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

Z = \frac{90 - 73.9}{8.9}

Z = 1.81

Z = 1.81 has a pvalue of 0.9649

X = 82

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

Z = \frac{82 - 73.9}{8.9}

Z = 0.91

Z = 0.91 has a pvalue of 0.8186

0.9649 - 0.8186 = 0.1463

14.63% probability that a student scores between 82 and 90

3 0
3 years ago
Which long division problem can be used to prove the formula for factoring the difference of two perfect cubes?
Mademuasel [1]
69
It’s 69

“Explaining “
4 0
2 years ago
Read 2 more answers
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