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Evgen [1.6K]
3 years ago
14

Y=x+5 4x+y=20 Solve by substitution

Mathematics
2 answers:
belka [17]3 years ago
6 0
The answer would be x=3
kramer3 years ago
3 0

Answer:

The solution of the given system is (3,8)

Step-by-step explanation:

<u>step 1:</u>-

Given equations are y= x+5......(1)

                                4 x+y=20.......(2)

<u>Step 2</u>:-

Adding both equation (1) and (2) equations and cancelled 'y' terms , we get

5 x-15=0

x=3

<u>Step 3:</u>-

Substitute x= 3 value in equation (1)

y=3+5

y=8

<u>Final answer</u>:-

The solution of the given system is (3,8)

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Answer:

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Step-by-step explanation:

The relationships are proportional.

Car B, Because 4 Gallons are used and Car A uses 8 when traveling 200 Miles.

8 0
3 years ago
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A researcher measures daily driving distance from college and weekly cost of gas for a group of commuting college students. What
juin [17]

Answer:

There is a positive correlation between these two variables.

Step-by-step explanation:

Positive correlation is an association amid two variables in which both variables change in the same direction.  

A positive correlation occurs when one variable declines as the other variable declines, or one variable escalates while the other escalates.

As the distance covered by the vehicle increases the amount of gas consumed also increases. Thus, the weekly cost of gas will also increase.

Thus, there is a positive correlation between these two variables.

6 0
3 years ago
What is question is asking
Pachacha [2.7K]
A) 72/910
b) 278/910
c) 57/910
d1) same as c) = 57/910
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d3) 101/910
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5 0
3 years ago
When Brooklyn runs the 400 meter dash, her finishing times are normally distributed with a mean of 76 seconds and a standard dev
KonstantinChe [14]

Using the Empirical Rule, it is found that her finishing time will be between 70 and 82 seconds in 95% of her races.

<h3>What does the Empirical Rule state?</h3>

It states that, for a normally distributed random variable:

  • Approximately 68% of the measures are within 1 standard deviation of the mean.
  • Approximately 95% of the measures are within 2 standard deviations of  the mean.
  • Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, the mean is of 76 seconds and the standard deviation is of 3 seconds, then:

76 - 2 x 3 = 70.

76 + 2 x 3 = 82.

Which means that values between 70 and 82 seconds are within 2 standard deviations of the mean, hence the percentage is of 95%.

More can be learned about the Empirical Rule at brainly.com/question/24537145

3 0
2 years ago
What is the correct answer NEED IT ASAP PLEASE​
tia_tia [17]

It is the last choice

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9x+12y\geq 1000

Hope that helps!

3 0
2 years ago
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