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sesenic [268]
3 years ago
6

Plz help. will give alot of points .

Mathematics
2 answers:
otez555 [7]3 years ago
7 0

The problem has you solving 4x = 88 and the first step - which is the proper step - is to divide by 4 on both sides. What it does is the following:

--gets x alone on one side of the equation

--keeps the equation balanced because it's on both sides

--Undoes the multiplying. Dividing and multiplying are inverse, or, undoing operations. 4 and x are put together with multiplying - so we use dividing to take it apart.

The idea of using 4 because it's a factor is the wrong choice. If the equation were 5x = 88 and you divide by 4, you aren't getting a single 1x alone. So the "divide because it's a factor" choice is wrong.


Thus the upper left choice is NOT a good reason and is the best answer.

mr Goodwill [35]3 years ago
3 0
Dividing 4× by 4 isolates x on one side of the equation.

all they others is a good reason to divide by 4

hope it helps
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Answer:

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6 0
3 years ago
The ages of trees in a forest are normally distributed with a mean of 25 years and a standard deviation of 4. Approximately what
harkovskaia [24]

Answer:

78.88%

Step-by-step explanation:

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\mu=25,\sigma=4,x_1=20,x_2=30

The z-score formula is given by

z-\text{score}=\frac{x-\mu}{\sigma}

For x_1=20

z_1=\frac{20-25}{4}\\\\z_1=-1.25

For x_2=30

z_2=\frac{30-25}{4}\\\\z_2=1.25

Now, we find the corresponding probability from the standard z score table.

For the z score -1.25, we have the probability 0.1056

For the z score 1.25, we have the probability 0.8944

Therefore, the percent of the trees that are between 20 and 30 years old is given by

0.8944 - 0.1056

= 0.7888

=78.88%

6 0
3 years ago
Read 2 more answers
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