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baherus [9]
2 years ago
6

Tell which variable you would choose to eliminate when solving the system by elimination. Then solve the system by elimination.

Equation 1: 2x+y=−5. Equation 2: −2x+y=8. You can eliminate [ ] by [ ]. The solution of the system is ( [ ], [ ] ).
Mathematics
1 answer:
Julli [10]2 years ago
3 0

Answer:

x = 3/2 and y = -8.

Step-by-step explanation:

Given equations are :

2x+y=−5 ....(1)

−2x+y=8 ....(2)

We need to solve the above equations.

Adding equation (1) and (2).

2x+y −2x+y=-5+8

2y = 3

x = 3/2

Put the value of x in equation (1).

2\times \dfrac{3}{2}+y=-5\\\\3+y=-5\\\\y=-5-3\\\\y=-8

So, the solution of the above equations are x = 3/2 and y = -8.

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tankabanditka [31]
She needs to earn at least 84 to buy the mp3 player

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number of hoursworked=h

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earnings is greater than or equal to 84
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3 years ago
*EXTRA POINTS* please answer #5 and #6
Annette [7]

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Step-by-step explanation:

5 0
3 years ago
Sarah, amy and liam stand on some weighing scales two at a time.here are the measurements:sarah and amy 70kgsarah and liam 80kgl
OLga [1]
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3 years ago
I have to find the value of x
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Step-by-step explanation:

A quadrilateral is inscribed in a circle, so it is a cyclic Quadrilateral.

Opposite angles of a cyclic quadrilateral are supplementary.

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From equations (1) & (2)

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(Multiplying both sides by 5)

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x = 900/36

x = 25

4 0
2 years ago
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