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3 years ago

Determine the best method to solve the system of equations. Then solve the system.

Mathematics

2 answers:

maxonik [38]3 years ago

8 0

Answer:

x=1 y = -1/2

(1,-1/2)

Step-by-step explanation:

7x-2y=8

5x+2y=4

I would use elimination since we have 2y in one equation and -2y in the other

7x-2y=8

5x+2y=4

--------------------

12x = 12

Divide each side by 12

12x/12 = 12/12

x =1

The substitute back into equation 2

5(1) +2y = 4

5 +2y = 4

Subtract 5

5-5+2y = 4-5

2y = -1

Divide by 2

2y/2 = -1/2

y = -1/2

Artist 52 [7]3 years ago

5 0

Answer:

The best method is the elimination method. The solution is (1, -1/2).

Step-by-step explanation:

7x - 2y = 8

5x + 2y = 4

12x = 12

x = 1

7(1) - 2y = 8

7 - 2y = 8

-2y = 1

y = -1/2

Make sure to write the answer in the form of an ordered pair.

Note: Alternative methods are graphing and the substitution method.

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3 years ago

Point m is located at 4,-2 what is located 2 units for point m

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Answer:

None

Step-by-step explanation:

Given

$m = (4,-2)$

Required

Point 2 units from m

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Read 2 more answers

The area of a rectangular wall of a barn is 300 square feet. its length is 10 feet longer than twice its width. find the length

Savatey [412]

L * W = 300 sq ft
 Length is 10 ft greater than twice the width.
L = 2W + 10
Substituting
(2W+10)*W = 300
2W^2 + 10W = 300
Divide both sides by 2
W^2 + 5W = 150
W^2 + 5W - 150 = 0
Factor
(W +15)(W -10) = 0

Roots are W=-15 and W=10.
A negative width is impossible, so W=10
L = 2W + 10
L = 2(10) + 10
L = 30

length = 30 feet, width = 10 feet

Check: 30*10 = 300

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