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rewona [7]
3 years ago
6

If A = -4m + 1, and B = 7m - 9, what is the value of A + B, in simplest form?

Mathematics
2 answers:
Sliva [168]3 years ago
7 0

Answer:

b. 3m - 8

Step-by-step explanation:

    A = -4m + 1

    B =   <u>7m -  9</u>     Add the terms in columns

A +B =  3m -  8

Natasha2012 [34]3 years ago
4 0
The ore the answer is B. Why?

Because (-4m+1) + (7m-9) = 3m - 8

You add -4m and 7m and get 3m and the only answer that has a POSITIVE 3m is B.

Anyways, you still have to check it. 1+(-9) is -8. So A+B = 3m - 8
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Answer: 49.85%

Step-by-step explanation:

Given : The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped ( normal distribution ) and has a mean of 61 and a standard deviation of 9.

i.e.  \mu=61 and \sigma=9

To find :  The approximate percentage of lightbulb replacement requests numbering between 34 and 61.

i.e. The approximate percentage of lightbulb replacement requests numbering between 34 and 34+3(9).

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According to the 68-95-99.7 rule, about 99.7% of the population lies within 3 standard deviations from the mean.

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i.e.,The approximate percentage of lightbulb replacement requests numbering between \mu and \mu+3(\sigma) = 49.85%

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4 0
3 years ago
Question 28 of
Helen [10]

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2 years ago
If DM = 35, what is the value of r?
Gennadij [26K]

Answer:

r = 11

Step-by-step explanation:

Given

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Collect Like Terms

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