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marissa [1.9K]
3 years ago
14

-6x+6y=6 -6x + 3y=-12 ???

Mathematics
2 answers:
Tcecarenko [31]3 years ago
7 0

Answer      

:x=5 y=6

Step-by-step explanation:

Darina [25.2K]3 years ago
5 0

Answer:

x=5 y=6

Step-by-step explanation:

Need to get rid of one variable to find one first. So I multiplied the second equation by -2 to get rid of y. So second equation becomes 12x-6y=24. add that to the first equation.

6x+6y=6

12x-6y=24

6x=30      then divide

x=5

then plug x into the original equation to get y.

-6(5) +6y=6

-30+6y=6    add 30 to both sides

6y=36       then divide

y=6

then put both into the original to make sure it makes sense

-6(5) +6(6)=6

-30+36=6

6=6

correct

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Answer:

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Step-by-step explanation:

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Read 2 more answers
Let f(x) = x2 - 81. Find f-1(x).
aalyn [17]
The answer is <span>1) ± √x+81
</span>
Step 1: Substitute y for f(x). <span>
Step 2: </span>Since every (x, y) has its partner (y, x)y switch x and y.
Step 3: <span>Solve for y.

Step 1.
The function is:         f(x) = x</span>² - 81
Substitute y for f(x):   y = x² - 81

Step 2.
Switch x and y: x = y² - 81

Step 3.
Solve for y (which is now f⁻¹(x)): f⁻¹(x) = y
x = y² - 81
y² = x + 81
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