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xxTIMURxx [149]
3 years ago
7

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

Mathematics
1 answer:
Misha Larkins [42]3 years ago
6 0

Answer:

x = 3/8 (but the fraction is negative.)

Decimal form if needed.

x = - 0.375

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Simplify this 13.) 13y² + 9y + 4y² - 31y
erastova [34]

Answer: 17y^2-22y

Step-by-step explanation:

13y^2+9y+4y^2-31y

\mathrm{Group\:like\:terms}

=13y^2+4y^2+9y-31y

\mathrm{Add\:similar\:elements:}\:13y^2+4y^2=17y^2

=17y^2+9y-31y

\mathrm{Add\:similar\:elements:}\:9y-31y=-22y

=17y^2-22y

3 0
3 years ago
A normally distributed data set has a mean of 0 and a standard deviation of 2. Which of the following is closest to the percent
frutty [35]

A normally distributed data set has a mean of 0 and a standard deviation of 2. The closest to the percent of values between -4.0 and 2.0 would be 84%.

<h3>What is the empirical rule?</h3>

According to the empirical rule, also known as the 68-95-99.7 rule, the percentage of values that lie within an interval with 68%, 95%, and 99.7% of the values lies within one, two, or three standard deviations of the mean of the distribution.

P(\mu - \sigma < X < \mu + \sigma)  \approx 68\%\\P(\mu - 2\sigma < X < \mu + 2\sigma)  \approx 95\%\\P(\mu - 3\sigma < X < \mu + 3\sigma)  \approx 99.7\%

A normally distributed data set has a mean of 0 and a standard deviation of 2.

Z=(x-\mu)/\sigma

P(x=-0.4)\\\\z=(-0.4-0)/2\\\\= -0.2\\\\P(x=2)\\z=(2-0)/2\\\\=1

P(-0.4 < x < 2)=p(-0.2 < z < 1)=p(-0.2 < z < 0)+p(0 < z < 1)……….(by symmetry)

=.49865+.3413

.83995…….(by (http://83995…….by) table value)

=.8400 × 100

=84%

Learn more about the empirical rule here:

brainly.com/question/13676793

#SPJ2

4 0
2 years ago
Solve the equation below.<br><br> 2/3 (9x - 12) - 6x
beks73 [17]

48

Step-by-step explanation:

idek I just need tge points so don't put what I put

3 0
3 years ago
Read 2 more answers
A taxi charges 2.50 plus .50 fee for each mile. If the ride costs 7.50 how many miles did he travel
NeX [460]

Answer:<em> 10 miles</em>

Step-by-step explanation:

<em>Mile 1: 3.00</em>

<em>Mile 2: 3.50</em>

<em>Mile 3: 4.00</em>

<em>Mile 4: 4.50</em>

<em>Mile 5: 5.00</em>

<em>Mile 6: 5.50</em>

<em>Mile 7: 6.00</em>

<em>Mile 8: 6.50</em>

<em>Mile 9: 7.00</em>

<em>Mile 10: 7.50</em>

7 0
3 years ago
Can someone help me with this Im not sure if My answer is correct
sergeinik [125]

Answer:

y = 2x - 3

Yes, your answer is correct.

Step-by-step explanation:

First, find the slope of the two points by using the slope formula:

        y2 - y1

m = -------------

        x2 - x1

         13 - 5

m = -------------

          8 - 4

         8

m = ------- = 2

         4

To find the y-intercept, plug in values into the slope-intercept formula:

y = mx + b

Where m = slope and b= y-intercept. Use any one of the points. I'll be using (4,5):

5 = (2) (4) + b

5 = 8 + b

-3 = b

b = -3

So, putting everything into the slope intercept formula:

y = 2x - 3

4 0
3 years ago
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