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Stella [2.4K]
2 years ago
11

-2y + x = 8 3y + 2x = 2 solve using substitution please show work

Mathematics
1 answer:
Inessa [10]2 years ago
4 0

Answer:

x=4,y=−2

Step-by-step explanation:

1 Solve for x in -2y+x=8

x=8+2y

2 Substitute x=8+2y into 3y+2x=2

7y+16=2

3 Solve for y in 7y+16=2

y=-2

4 Substitute y=-2 into x=8+2y

x=4

5 Therefore,

​x=4

​y=−2

​​

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Can you help my sister with fractions while I'm studying. I need to review on my exams
Travka [436]

Answer:

4 + \frac{1}{2} = 4 \frac{1}{2}

Step-by-step explanation:

We have 4 whole circles and half a circle so 4 + \frac{1}{2} = 4 \frac{1}{2}

3 0
1 year ago
What is the function written in vertex form?
lys-0071 [83]

Answer:

The answer in the procedure

Step-by-step explanation:

The question does not present the graph, however it can be answered to help the student solve similar problems.

we know that

The equation of a vertical parabola into vertex form is equal to

f(x)=a(x-h)^{2}+k

where

a is a coefficient

(h,k) is the vertex

If the coefficient a is positive then the parabola open up and the vertex is a minimum

If the coefficient a is negative then the parabola open down and the vertex is a maximum

case A) we have

f(x)=3(x+4)^{2}-6

The vertex is the point (-4,-6)

a=3

therefore

The parabola open up, the vertex is a minimum

case B) we have

f(x)=3(x+4)^{2}-38

The vertex is the point (-4,-38)

a=3

therefore

The parabola open up, the vertex is a minimum

case C) we have

f(x)=3(x-4)^{2}-6

The vertex is the point (4,-6)

a=3

therefore

The parabola open up, the vertex is a minimum

case D) we have

f(x)=3(x-4)^{2}-38

The vertex is the point (4,-38)

a=3

therefore

The parabola open up, the vertex is a minimum

4 0
2 years ago
Allyson walked 10.8 km to the school. If 1 mile = 1.6 km, about how many miles did she walk?
seropon [69]

Answer:

According to my calculations, 1.6 goes into 10.8 a total of 6 times with a remainder of 1.1999999999999993. If you continue the long division beyond the decimal point, the result would be 6.75.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
1. How many variables are involved in the chi-square test?
GarryVolchara [31]

The result of the respective questions are:

  • This chi-square test only takes into consideration one variable.
  • The  type of chi-square test this is is a Goodness of Fit
  • df= 3
  • NO

<h3>How many variables are involved in the chi-square test?</h3>

a)

This chi-square test only takes into consideration one variable.

b)

The  type of chi-square test this is, is a Goodness of Fit

To test the hypothesis, we must determine whether the actual data conform to the assumed distribution.

The "Goodness-of-Fit" test is a statistical hypothesis test that determines how well the data that was seen resembles the data that was predicted.

c)

Parameter

n = 4

Therefore

Degrees of freedom

df= n - 1

df= 4 - 1

df= 3

d)

In conclusion

Parameters

\alpha = 0.05

df = 3

Hence

Critical value = 7.814728

Test statistic = 6.6

Test statistic < Critical value, .

NO, the result of this test is not statistically significant.

Read more about Probability

brainly.com/question/11234923

#SPJ1

3 0
1 year ago
Someone please help me i literally cant do geometry
mote1985 [20]

Answer:

Just fail it.

Step-by-step explanation:

Sleep in class

Talk to friends

Get put into e2020 and get ALL the answers off of here.

4 0
2 years ago
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