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mars1129 [50]
3 years ago
8

What is the solution to this equation? x=15=28

Mathematics
2 answers:
AnnZ [28]3 years ago
6 0

Answer:x=13

Step-by-step explanation:

Nata [24]3 years ago
3 0
You will need to subtract 28 from 15 and you will get 13. so you answer is 13
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What is the solution set for the following inequality? 4x – 3 + 6x > 5x + 7
Arada [10]

Answer: x > 2

Step-by-step explanation:

4 0
2 years ago
257/5000 In an envelope there are 20 ballots, 8 have drawn a car the rest are white. Find the probability to extract at least on
Gwar [14]

Answer:

Step-by-step explanation:

There are 20 ballots, 8 have drawn a car the rest are white.

Find the probability to extract at least one ballot with the drawing of a car if not replaced:

1. If a ballot is taken out:

8 have drawn a car: thus we have 8/20 = 2/5

2. If two ballots are removed, probability of extracting 1 ballot with drawing of car is 8/20 leaving 7 out of 19 remaining. The 7/19 is the probability of drawing out a second ballot with the drawing of a car. Thus we have

8/20 * 7/19 = 56/380 = 14/95

3. If three ballots are removed, probability of extracting 1 ballot with drawing of car is 8/20 leaving 7 out of 19 remaining. The 7/19 is the probability of drawing out a second ballot with the drawing of a car leaving 6 out of 18 remaining. The 6/18 is the probability of drawing out a third ballot with the drawing of a car.

8/20 * 7/19 * 6/18 = 42/855

5 0
3 years ago
For simple linear regression, y = β0 + β1x + u, which one of the following statements is true?
RSB [31]

Answer:

Option a) u is called the "error term". It is the error we make in prediction

Option d) x is called the independent variable because x is independent from y and u.

Step-by-step explanation:

We are given the following information in the question:

y = \beta_0 + \beta_1x + u

where y is the dependent variable, x is the independent variable.

\beta_0: It is the value of y when x is zero, that is y-intercept.

\beta_1: It is the coefficient of x in predicting the dependent variable y.

u is the error term.

  • An error term represents the margin of error.
  • It refers to the sum of the deviations within the regression line, that is the difference between the predicted value and the observed value of y.

Thus, Option A) u is the error term and Option D)  x is called the independent variable because x is independent from y and u are the correct answer.

6 0
3 years ago
If the point (4,-2) is included in a direct variation relationship, which point also belongs in this direct variation? A. (-4,2)
IceJOKER [234]

Answer:

(-4,2) belongs in this direct variation.

Step-by-step explanation:

Let the direct variation relationship is expressed by the equation y = mx ........ (1), where x and y are in direct variation and k is the variation constant.

Now, the point (4,-2) is included in the direct variation relationship, then from equation (1) we get, -2 = 4m

⇒ m =  - \frac{1}{2}

Therefore, the equation (1) becomes y = - \frac{1}{2}x

⇒ x + 2y = 0 ......... (2)

Now, from the given four options only the point (-4,2) satisfies the relation (2).

Hence, (-4,2) belongs in this direct variation. (Answer)

5 0
3 years ago
What is 2+2 pls help
Alexandra [31]

Answer:

4

Step-by-step explanation:

2 + 2 += 4

This can be solved by addition.

7 0
2 years ago
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