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horsena [70]
3 years ago
7

Calculate the value of the expression (Explain in words) -30-(-20)

Mathematics
1 answer:
oee [108]3 years ago
8 0

Answer:

-10

Step-by-step explanation:

when you subract a negative the minus signs negate each other

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Expand and simplify 5(3x+2)-2(4x-1)
blsea [12.9K]

5(3x+2)-2(4x-1)

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2 years ago
Which expression is equivalent to the expression below?
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Answer:

5r + 2p + 6

Step-by-step explanation:

= 4r + 9 + r + 2p - 3

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= 5r + 2p + 6

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For the 405 highway that car pass through a checkpoint, assume the speeds are normally distributed such that μ= 61 miles per hou
Strike441 [17]

Answer:

Z = 1

Step-by-step explanation:

Z - score

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 = 61, \sigma = 4

Calculate the Z value for the next car that passes through the checkpoint will be traveling slower than 65 miles per hour.

This is Z when X = 65. So

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

Z = \frac{65 - 61}{4}

Z = 1

4 0
3 years ago
Uh help it has to e same answers for all liek yk?
Finger [1]

Answer:

x = 8/3

Step-by-step explanation:

6x + 4 = 3x + 12

3x + 4 = 12

3x = 8

x = 8/3

5 0
3 years ago
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