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3 years ago

Solve by substitution -4x+y=6 -5x-y=21

Mathematics

1 answer:

inn [45]3 years ago

7 0

Answer:

x=-3, y=-6. (-3, -6).

Step-by-step explanation:

-4x+y=6

-5x-y=21

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

-9x=27

x=27/-9

x=-3

-5(-3)-y=21

15-y=21

y=15-21

y=-6

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Step-by-step explanation:

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2 years ago

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3 years ago

75+45+x/69=180 solve for x please :)

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Step-by-step explanation:

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2 years ago

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Yakvenalex [24]

Answer:

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Step-by-step explanation:

we know that

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$LA=2\pi rh$

we have that

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The diameter of the can is 4 inches

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3 years ago

What is the value of the y coordinate of any point on the x axis?

Leona [35]

The value of the y coordinate of any point on the x axis is always 0.

Explanation

Suppose, the co ordinate of any point is $(a,b)$ .

It means, the distance of the point from x-axis is ' $b$ ' and distance from y-axis is ' $a$ '.

Now if the point lies on the x-axis, that means the distance of the point from x-axis will be 0. Thus, the value of ' $b$ ' will be 0.

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3 years ago