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sladkih [1.3K]
3 years ago
5

3x + 8y = 85 7x -2y =33 (solve the following equations)

Mathematics
2 answers:
Alexxandr [17]3 years ago
8 0
3x+8y=85
7x-2y=33

4(7x-2y=33)
28x-8y=132
+3x+8y=85

31x=217
__ ___
31 31

X= 7

7(7)-2y=33
49-2y=33
-2y=-16
______
-2

Y=8

(7,8)
Stella [2.4K]3 years ago
5 0
What is it that you are looking for ?
x or y ?
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Select all of the questions for which x=3 is a solution
Brrunno [24]

Answer:

there are no questions

Step-by-step explanation:

5 0
3 years ago
Drag the tiles to the correct boxes to complete the pairs.
Elza [17]

Answer:

Part 1)  -7 →  \dfrac{y^2-y+6}{-2(y+7)}  

Part 2) 3/2 → \dfrac{y^2-2y+1}{2y-3} 

Part 3) 1  → \dfrac{5y^2-6y+1}{-5(y-1)}

Part 4) -1/4 → \dfrac{y(y+5)}{4y+1}

Step-by-step explanation:

<u><em>The complete question in the attached figure</em></u>

we know that

To find out the non permissible replacements for y, equate the denominator of each expression equal to 0.

step 1    

we have

\dfrac{y^2-2y+1}{2y-3}

Equate (2y-3) equal to 0.

2y-3=0

solve for y

Adds 3 both sides.

2y=3

Divide both sides by 2.

y=\dfrac{3}{2}

therefore

3/2 is the non permissible replacement for y.

step 2

we have

\dfrac{y(y+5)}{4y+1}

Equate (4y+1) equal to 0.

4y+1=0

Subtract 1 both sides

4y=-1

Divide by 4 both sides

y=-\dfrac{1}{4}

therefore

-1/4 is the non permissible replacement for y.

step 3

we have

\dfrac{5y^2-6y+1}{-5(y-1)}

Equate -5(y-1) equal to 0.

-5(y-1)=0

Divide by -5 both sides

y-1=0

Adds 1 both sides

y=1

therefore

1 is the non permissible replacement for y.

step 4

we have

\dfrac{y^2-y+6}{-2(y+7)}

Equate -2(y+7) equal to 0.

-2(y+7)=0

Divide by -2 both sides

y+7=0

Subtract 7 both sides

y=-7

therefore

-7 is the non permissible replacement for y

7 0
3 years ago
Ryan's Study Schedule
Zarrin [17]
Math and english give you a total of 4 hours. and social studies and science gives you a total of 2 3/4 hours. add them up, and the closest he will spend to studying is 7 hours
7 0
4 years ago
You can buy 20 ounces of cereal for $4.40 or 16 ounces of the same brand for $3.68. Which is the better buy?
Natalka [10]
The answer to your Q the better one is the 16 ounces of cereal because it is the least
3 0
4 years ago
Please help!!!! and when you answer please explain how you got it so in the future I can understand it
UNO [17]

Answer:

It does

Step-by-step explanation:

This is because the line has points in which time and distance are connected (Ex. 100 and 2)

Hope this helps! :)

7 0
3 years ago
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