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3 years ago

Y = 4x-9 y = x-3 Which method and why? Solve, shoving all work

Mathematics

1 answer:

vodomira [7]3 years ago

7 0

Answer:

(2,-1)

Step-by-step explanation:

The ys in both questions are isolated on one side of the equation in both. The numerical coefficient of both is 1. Therefore you should equate the the left side of each equation to the other left side. The solution is the easiest one to solve because there is only 1 unknown on both sides.

4x - 9 = x - 3 Subtract x from both sides.

4x-x - 9 = -3 Combine

3x -9 = - 3 Add 9 to both sides

3x - 9+9 = - 3+9

3x = 6 Divide by 3

3x/3 = 6/3

x = 2

===============

Now use the second equation to solve for y

y = x - 3

y = 2 - 3

y = -1

==============

The solution is (2,-1)

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3 years ago

Are 4(5+x) and (5+4)+x equal

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Answer:

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Step-by-step explanation:

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2 years ago

The ratio of Mike buying fish to Millie buying fish was 8 to 2. If in total they bought 150 pounds of fish. How many pounds did

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Step-by-step explanation:

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3 years ago

-8x^2+4x+5=0 using quadratic formula

daser333 [38]

So you want to solve for x?

It would be nice if this would easily factor:
(-4x + 5)(2x +1) = 0    This will not work!

So you need to use the quadratic formula:
a = -8, b = 4, c = 5

$x = \frac{-b+/- \sqrt{b^{2}-4ac} }{2a}$

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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