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WITCHER [35]
3 years ago
10

You now have entered the math zone

Mathematics
2 answers:
Ostrovityanka [42]3 years ago
4 0

Answer:

12-12, it's a decrease so you subtract.

IrinaVladis [17]3 years ago
4 0
I believe it would be 12-12

Explanation:
It said the original temperature was 12 and that it decreased by 12 so fill in subtraction sign instead of decreased and you would have 12-12
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Please help me figure this out:
AveGali [126]
It’s C. Because I said so (it makes me give an explanation)
5 0
2 years ago
What is the slope of the line through the points (-4, 6) and (-3, -1)?
andreev551 [17]

Answer:

m= -7

Step-by-step explanation:

using the slope formula, plug in the variables and solve

m=rise/run

m=y2-y1 / x2-x1

(x1, y1) = coordinates of first point in the line

(x2, y2) = coordinates of second point in the line

4 0
2 years ago
Read 2 more answers
Thickness measurements of ancient prehistoric Native American pot shards discovered in a Hopi village are approximately normally
Dafna1 [17]

Answer:

a) 0.0869 = 8.69% probability that the thickness is less than 3.0 mm

b) 0.0668 = 6.68% probability that the thickness is more than 7.0 mm

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 = 4.9, \sigma = 1.4

(a) the thickness is less than 3.0 mm

This is the pvalue of Z when X = 3.

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

Z = \frac{3 - 4.9}{1.4}

Z = -1.36

Z = -1.36 has a pvalue of 0.0869

0.0869 = 8.69% probability that the thickness is less than 3.0 mm

(b) the thickness is more than 7.0 mm

This is 1 subtracted by the pvalue of Z when X = 7. So

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

Z = \frac{7 - 4.9}{1.4}

Z = 1.5

Z = 1.5 has a pvalue of 0.9332

1 - 0.9332 = 0.0668

0.0668 = 6.68% probability that the thickness is more than 7.0 mm

5 0
3 years ago
There are 1200 students at silver lake middle school 700 Are eighth graders what percent of the students are in the eighth grade
Leni [432]
(700/1200)*100 = 58.33%, rounding to the nearest 10th of à percent we get 60%
7 0
3 years ago
Please help it is for a test. The question is in the photo.
Anettt [7]

Answer:

umm?

Step-by-step explanation:

6 0
3 years ago
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