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algol13
3 years ago
7

Solve the systems of equations 6x+3y=9 2x+3y=1

Mathematics
1 answer:
patriot [66]3 years ago
7 0
Solve by elimination.
The goal is to cancel out one of the variables in order to easily solve for the other variable.

Do this by changing the equations so that the coefficients of either x or y add up to 0.

Notice the coefficients of y are 3 and 3, if we make one of them negative then they add up to 0. 3+ (-3) = 0

Multiply 2nd equation by -1.

6x +3y = 9
-2x -3y = -1
__________
4x +0y = 8

Solve for x
4x = 8
x = 8/4 = 2

Plug x=2 back into one of original equations to find y.
---> 2(2) + 3y = 1
---> 4 + 3y = 1
---> 3y = -3
---> y = -1

Therefore solution is (2,-1)
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Step-by-step explanation:

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3 years ago
Joe is trying to soup up his dragster. He knows that the time needed for the car to go from 0 to 100 miles per hour varies inver
inysia [295]
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The hardest part of this is setting up the equation -- the calculations are pretty easy.

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You can think of this as:

200 HP = 10 seconds
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You set the equation up as:

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So, as you increase the horsepower from 200 to 250, the time decreases from 10 seconds to 8 seconds.

Hope this helps!

Good luck.
3 0
3 years ago
Hope someone can help me with this
Norma-Jean [14]
Hi,

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v = \pi {r}^{2} h

To get radius you need to divide diameter with 2 like this.

80 \div 2 = 40

Now just put your values into formula.

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r3t40
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3 years ago
I need 3 diffent names for slope
marshall27 [118]

Answer:

I don't know what you mean by names but I think you mean this:

<em>Synonyms & Antonyms of slope</em>

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4 0
2 years ago
What is an equation of the line in the slope- intersepct is (0,3)
balu736 [363]

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2 years ago
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