12-6r=2r+36 (2-step equations)

Mathematics

2 answers:

mart [117]1 year ago

5 0

Answer: r=-3

Step-by-step explanation:

12-6r=2r+36

12=8r+36

-24=8r

r=-3

ad-work [718]1 year ago

3 0

The answer is -3.

Explation:

12-6r=2r+36
+6r +6r
———————
12=8r+36
-36 -36

-24=8r
then divide each side by 8 so you then get r= -3 as you’re answer.

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A.)
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a = 9.81 m/s^2 ( accn of free fall )
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b.)
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4 0

3 years ago

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elixir [45]

Answer:

P(X < 80) = 0.89435.

Step-by-step explanation:

When the distribution is normal, we use 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 question, we have that:

$\mu = 60, \sigma = 16$