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4 years ago

I NEED HELP ASAP solve the systems of equations using elimination

Mathematics

2 answers:

Svetach [21]4 years ago

6 0

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▹ Answer

(-2, 1)

▹ Step-by-Step Explanation

4x + 3y = -5

-2x + 2y = 6

4x + 3y = -5

x = -3 + y

4(-3 + y) + 3y = -5

y = 1

x = -3 + 1

x = -2

(x, y) = (-2, 1)

Hope this helps!

- CloutAnswers ❁

Brainliest is greatly appreciated!

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Naddika [18.5K]4 years ago

3 0

Answer:

x = -2

y = 1

Step-by-step explanation:

Solve for x in the second equation.

-2x = 6 - 2y

x = 6/-2 - 2/-2y

x = -3 + y

Put x as -3+y in the first equation and solve for y.

4(-3 + y) + 3y = -5

-12 + 4y + 3y = -5

-12 + 7y = -5

7y = -5 + 12

7y = 7

7/7y = 7/7

y = 1

Put y as 1 in the second equation and solve for x.

x = -3 + (1)

x = -2

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3 years ago

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scoundrel [369]

Answer:

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Step-by-step explanation:

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4 0

3 years ago

You want to paint the walls of your bedroom. Two walls measure 15 ft by 9 ft, and the other two walls measure 18 ft by 9 ft. The

sertanlavr [38]

Answer:

The total amount you will spend on the paint=$34

Step-by-step explanation:

Step 1: Determine total area of walls

The total area of walls=Area of wall 1+area of wall 2+area of wall 3+area of wall 4

where;

area of wall 1=(15×9)=135 ft²

area of wall 2=(15×9)=135 ft²

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area of wall 4=(18×9)=162 ft²

replacing;

Total area of walls=(135×2)+(162×2)=594 ft²

Total area of walls=594 ft²

Step 2: Number of gallons of paint needed

Use the expression;

Total area of walls=area per gallon cans×number of gallon cans needed

where;

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number of gallons=n

replacing;

594=400×n

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n=1.485

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3 years ago

Need someone with a big brain to help lol Solve for x

AfilCa [17]

Answer:

x=4

Step-by-step explanation:

Hey there!

I am going to use this image as an example so you can understand the formula

The formula for problems like these is

B(BA)=D(DC)

So all we have to do is plug in the numeric values

so now we have 5(5+x+3)=6(6+x)

now we just solve for x

5(5+x+3)=6(6+x)

step 1 distribute the 5 to what is in the parenthesis (5, x and 3)

5x5=25

5*x=5x

5x3=15

so now we have

25+5x+15=6(6+x)

step 2 distribute the 6 to what is in the parenthesis (6 and x)

6x6=36

6*x=6x

now we have

25+5x+15=6x=36

step 3 combine like terms, the only like terms are 25 and 15

15+25=40

now we have

40+5x=6x+36

step 4 subtract 5x from each side

5x-5x cancels out

6x-5x=x

now we have

40=x+36

step 5 subtract 36 from each side

40-36=4

36-36 cancels out

now we have

x=4 so we can conclude that x=4

hope this helps :)

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