What is the property of -7+8(-5)+2

Mathematics

1 answer:

Kamila [148]3 years ago

7 0

Answer:

distributive property

Step-by-step explanation:

i think

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A rhinoceros weight when rounded to the nearest thousand was 4,000 pounds. Which of these is the least the rhinoceros could have

Rudik [331]

Answer:

B- 3,500.

Step-by-step explanation:

This is because 3,500 is the lowest number that can be rounded to 4,000.

3,999 and 4,001 can also be rounded but.. (let me show you an image to help).

3,500 < 3,999 < 4,001.

That goes from smallest to largest numbers that round to 4,000.

Hope that helps. x

5 0

3 years ago

HELP PLZ<br> WILL NAME YOU

nekit [7.7K]

Answer:

1-B The arrow is moving to the left which means that each equation should be negative which'll result in a negative.

2-A

8 0

3 years ago

An appliance dealer's website features the mean life expectancy values for major household appliances. A standard refrigerator's

marshall27 [118]

Answer:

There is an 84% probability that your standard refrigerator will last between 12 and 20 years.

Step-by-step explanation:

Problems of normally distributed samples can be 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:

A standard refrigerator's mean life expectancy is 18 years with a standard deviation of 2 years. This means that $\mu = 18, \sigma = 2$ .