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3 years ago

-3(-2x+1)-x=3(-x+2)-1

Mathematics

2 answers:

olga55 [171]3 years ago

8 0

Answer: I think it is 5 or 4

hram777 [196]3 years ago

7 0

1 Regroup terms.
−
3
(
−
2
x
+
1
)
−
x
=
3
(
2
−
x
)
−
1
−3(−2x+1)−x=3(2−x)−1

2 Expand.
6
x
−
3
−
x
=
6
−
3
x
−
1
6x−3−x=6−3x−1

3 Simplify
6
x
−
3
−
x
6x−3−x to
5
x
−
3
5x−3.
5
x
−
3
=
6
−
3
x
−
1
5x−3=6−3x−1

4 Simplify
6
−
3
x
−
1
6−3x−1 to
−
3
x
+
5
−3x+5.
5
x
−
3
=
−
3
x
+
5
5x−3=−3x+5

5 Add
3
3 to both sides.
5
x
=
−
3
x
+
5
+
3
5x=−3x+5+3

6 Simplify
−
3
x
+
5
+
3
−3x+5+3 to
−
3
x
+
8
−3x+8.
5
x
=
−
3
x
+
8
5x=−3x+8

7 Add
3
x
3x to both sides.
5
x
+
3
x
=
8
5x+3x=8

8 Simplify
5
x
+
3
x
5x+3x to
8
x
8x.
8
x
=
8
8x=8

9 Divide both sides by
8
8.
x
=
1
ANSWER ~x=1

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natali 33 [55]

The function on the table is decreasing on the interval [-2, 0).

<h3>Over what interval is the function shown in the table decreasing?</h3>

A function is decreasing if, as x increases, f(x) decreases.

We can see that at x = -2, f(-2) = 12.

Then at x = 0, f(0) = 0.

And for the value after that:

x = 1, f(1) = 3

So now the function increases. Then we conclude that the function is decreasing on the interval [-2, 0), and after that the function increases.

If you want to learn more about decreasing functions:

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2 years ago

Consider a value to be significantly low if its z score less than or equal to minus−2 or consider a value to be significantly hi

katrin2010 [14]

Answer:

Test scores of 10.2 or lower are significantly low.

Test scores of 31.4 or higher are significantly high.

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:

$\mu = 20.8, \sigma = 5.3$

Identify the test scores that are significantly low or significantly high.

Significantly low

Z = -2 and lower.

So the significantly low scores are thoses values that are lower or equal than X when Z = -2. So

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

$-2 = \frac{X - 20.8}{5.3}$

$X - 20.8 = -2*5.3$

$X = 10.2$

Test scores of 10.2 or lower are significantly low.

Significantly high

Z = 2 and higher.

So the significantly high scores are thoses values that are higherr or equal than X when Z = 2. So

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

$2 = \frac{X - 20.8}{5.3}$

$X - 20.8 = 2*5.3$

$X = 31.4$

Test scores of 31.4 or higher are significantly high.

3 0

4 years ago

What it the average rate between o and 20?

kiruha [24]

Hey the answer to your question is 10

5 0

3 years ago

Shen drove 780 miles in 12 hours. At the same rate, how many miles would he drive in 5 hours?

Wittaler [7]

780miles/12 hours equals 65 miles per 1 hour. if you are going at the same rate, you multiply 65 miles times 5 hours to get 325 miles. he drove 325 miles in 5 hours

7 0

3 years ago

Bacillus cereus is a soil-dwelling bacterium that sometimes causes food poisoning. Each cell divides to form two new cells every

Readme [11.4K]

Answer: There are 6400 bacteria that will be present after 3 hours.

Step-by-step explanation:

Since we have given that

Initial number of bacterial cells = 100

Each cell divides to form two new cells every 30 minutes.

Number of hours = 3 hrs

Number of minutes in 3 hours = 3\times 60 = 180 minutes

Number of 30 minutes in 3 hours = $\dfrac{180}{30}=6$

So, our equation becomes,

$P(x)=ab^x\\\\P(3)=100(2)^6\\\\P(3)=6400$

Hence, there are 6400 bacteria that will be present after 3 hours.

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3 years ago