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Usimov [2.4K]
4 years ago
5

Tell whether the ordered pair is a solution of the system of linear equations. Explain. (3 , 4) x + y = 7 x – 2y = -5

Mathematics
1 answer:
Leya [2.2K]4 years ago
8 0
<span>A) x + y = 7
B) x – 2y = -5
Multiplying equation A by 2
A) 2x + 2y = 14 then adding it to B
B) x -2y = -5
3x = 9
x = 3
y = 4
So, (3,4) is a solution.

</span>
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Rufina [12.5K]

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lidiya [134]

A plane leaves the airport at 9:15pm and travels at speed 560km/h then at midnight plane will be at 1540 km far away.

As given,

Plane leaves the airport at 9:15 pm

Plane travels at speed of 560 km /h

Total time = 2hour+ 45minutes

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Therefore, a plane leaves the airport at 9:15pm and travels at  speed 560km/h then at midnight plane will be at 1540 km far away.

Learn more about speed here

brainly.com/question/28224010

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Verizon [17]
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You already know you have a slope of -8, so m = -8, and you have

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Use the point you know and substitute it in for x and y, and solve for b.

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Answer:

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Step-by-step explanation:

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