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3 years ago

What is 2x+y=8 and x-2y=-1

1 answer:

4 0

The solutions of x and y?

2x+y=8...(1)
x-2y=-1...(2)
for (2), x=-1+2y...(3)
sub(3) into(1),
2(-1+2y) +y=8
-2+4y+y=8
5y=10
y=2
sub y=2 into(3)

x=-1+2(2) =3
therefore, x=3,y=2

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stepladder [879]

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3 years ago

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Vera_Pavlovna [14]

Answer:

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Step-by-step explanation:

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2 years ago

Suppose y varies directly as x, and y=14 when x=4. What is the value of y when x=9

Katena32 [7]

Given :-

y varies directly as x, and y=14 when x=4.

To Find :-

the value of y when x=9 .

Solution :-

According to Question ,

y = kx ( k is constant )

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14 = k(4)
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k = 7/2

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2 years ago

40 POINTS IF YOU ANSWER CORRECTLY!

noname [10]

Answer:

Step-by-step explanation:

y is 15.49

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lora16 [44]

I think it's need to be a graph right?

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3 years ago

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