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3 years ago

Y= 3x+13 y=x-3 How do you solve this equation?

Mathematics

2 answers:

ra1l [238]3 years ago

6 0

Answer:

x=-5 & y=-2

Step-by-step explanation:

y= 3x+13

y= x-3

x-3=3x+13

-3=2x+13

-10=2x

x=-5

then

y=3(-5)+13

y=-15+13

y=-2

Gemiola [76]3 years ago

3 0

Answer:

x=-8, y=-11. (-8, -11).

Step-by-step explanation:

y=3x+13

y=x-3

-----------

3x+13=x-3

3x-x+13=-3

2x+13=-3

2x=-3-13

2x=-16

x=-16/2

x=-8

y=-8-3=-11

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Answer:

$0.071,1.928$

Step-by-step explanation:

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Sample size n 25 20

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Sample standard deviation s $2 $1

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$\bar{x_1}=9\\ \bar{x_2}=8$

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Standard error of difference of means = $\sqrt{\frac{2^2}{25}+\frac{1^2}{20}}$

Standard error of difference of means = $0.458$

Degree of freedom = $\frac{\sqrt{(\frac{s_1^2}{n_1}+\frac{s_2^2}{n_2}})^2}{\frac{(\frac{s_1^2}{n_1})^2}{n_1-1}+\frac{(\frac{s_2^2}{n_2})^2}{n_2-1}}$

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Degree of freedom =36

So, z value at 95% confidence interval and 36 degree of freedom = 2.0280

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Confidence interval is $0.071,1.928$

4 0

3 years ago

Alonzo and Miguel scored a total of 54 points in a basketball game. Miguel scored 4 more points than Alonzo. How would I graph t

Liono4ka [1.6K]

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3 years ago

A recent gasoline survey said that the national average price of gasoline was $1.298 a gallon. It was felt that gasoline price i

slava [35]

Answer:

alternative hypothesis : H₁ :

Recent Gasoline surveys felt that gasoline price in Texas was significantly lower than the national average

Alternative Hypothesis : H₁: μ < $1.298 a gallon

Step-by-step explanation:

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Null hypothesis is rejected

Alternative hypothesis is accepted

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3 years ago

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