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4 years ago

How do i solve this function? (Number 28)

Mathematics

1 answer:

ikadub [295]4 years ago

7 0

For ever input, there is one ouput

it means we can't repeat the same x with a different y
but repeats of y's are allowed

pick any numbers that haven't been used as an input

-5 isn't taken
0 is taken
11 is taken
-1 is taken
2 is not taken
17 is taken

so -5 and -1 or A and D are the answers

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3 years ago

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Fine the missing coordinate of the ordered pair

katrin2010 [14]

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3 years ago

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3 years ago

Solve the linear system of equations using the linear combination method.<br> 4x-9y=20<br> 2x-6y=16

maxonik [38]

The solution is (-4,4)

Step-by-step explanation:

Given equations are:

$4x-9y = 20\ \ \ \ Eqn1\\2x-6x = 16\ \ \ \ Eqn2$

In linear combination method, we have to make coefficients of any one variable opposites by multiplying with an integer

So multiplying 2nd equation by -2

$-2(2x-6y=16)\\-4x+6y=-32\ \ \ \ Eqn3$

Adding Equation 1 and Equation 3:

$4x-9y-4x+12y = 20-32\\3y = -12$

Dividing both sides by 3

$\frac{3y}{3} = \frac{-12}{3}\\y = -4$

Putting y=-4 in equation 1

$4x-9(-4) = 20\\4x +36= 20\\4x = 20-36\\4x = -16$

Dividing both sides by 4

$\frac{4x}{4} = \frac{-16}{4}\\x = -4$

Hence,

The solution is (-4,4)

Keywords: Linear combination, linear equations

Learn more about linear combination method at:

#LearnwithBrainly

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4 years ago

What is the value of x in the solution to the following system of equations?

77julia77 [94]

We can easily eliminate x. To do this, mult. the 1st eqn by -1: -x + y = 3

and add this result to the second equation:

-x + y = 3
<span>x + 3y = 5
</span>--------------
4y = 8 Then y = 2. Sub 2 for y in the 2nd equation: x + 3(-2) = 5
x = 5+6
Then x = 11

The solution is (11, 2).

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3 years ago

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