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2 years ago

-1 - ( -2 ) = Can you help me with this question :)

Mathematics

2 answers:

attashe74 [19]2 years ago

7 0

Answer:1

Solution Steps

−1−(−2)

The opposite of −2 is 2.

−1+2

Add −1 and 2 to get 1.

wolverine [178]2 years ago

4 0

Answer:

-1 - ( -2 ) = 1

Step-by-step explanation:

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Marco paid $36.89 for 8.6 gallons of gas. What is the price per gallon?

Semenov [28]

36.89 total divided by the 8.6 gallons he bought = 4.2 so the price per gallon would be $4.20

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3 years ago

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A set of data items is normally distributed with a mean of 400 and a standard deviation of 60. Find the data item in this distri

Softa [21]

Answer:

The data item is $X = 580$

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Mean of 400 and a standard deviation of 60.

This means that $\mu = 400, \sigma = 60$

z=3

We have to find X when Z = 3. So

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

$3 = \frac{X - 400}{60}$

$X - 400 = 3*60$

$X = 580$

The data item is $X = 580$

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3 years ago

Put Answer below....

xenn [34]

The value of M equals 70°

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2 years ago

Find the sum or difference of (2m+7)-(3-4m)

pickupchik [31]

(2m + 7) - (3 - 4m)

First distribute the (-) in front of the quantity of 3 - 4m.
Think of it as this:

-1(3 - 4m)

You multiply each number inside the parenthesis by -1.

So:

3*-1 = -3
-4m * -1 = 4m

Now that you've distributed the negative you can remove the parenthesis.
Now you'll just set it all up like you would any normal problem. Because -3 is negative you'll make it subtract.... I'll show you what I mean:

2m + 7 - 3 + 4m

Combine like terms (Terms which have the same variables... in this case the same number of m's)

Rearranging them can help!

4m + 2m + 7 - 3

6m + 7 - 3

6m + 4, is our difference!

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3 years ago

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What is 16.748 rounded to nearest hundredths

IrinaK [193]

Answer:

17.000

Step-by-step explanation:

You round up because 7 is closest to 10

Hope this helps :)

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3 years ago