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forsale [732]
2 years ago
12

X+4y=-4, x+10y=-16, solve using systems of equations, elimination

Mathematics
1 answer:
lora16 [44]2 years ago
6 0

Answer:

x = 4

y = -2

Step-by-step explanation:

x + 10y = -16

-x -4y = 4 <-- ( multiplied x+4y=-4 with -1 so the x's cancel)

6y = -12

y = -2

put -2 back in the equation to get x

x + 10y = -16

x -20 = -16

x = 4

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Find the inverse of f(x)= -x + 3
inna [77]
Let g the inverse function of f.

The most important property of g and f being inverses of each other, is that 

g(f(x))=x,      also f(g(x))=x

so, what one function 'does' to x, the other 'undoes' it.



Thus, we have:

f(g(x))=x      and alos   f(g(x))= -g(x)+3, from the rule


thus : 

-g(x)+3=x

-g(x)=x-3

g(x)=-x+3


check: f(g(x))=f(-x+3)=-(-x+3)+3=x-3+3=x


Answer: the inverse of f is g, such that g(x)=-x+3
4 0
3 years ago
Please answer both of these questions. :) Thank you!
son4ous [18]
Answers:
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Explanations:
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7 0
3 years ago
ZA and B are supplementary angles. If mA (x - 9)° and
Verizon [17]

The measurement of  ∠B  is 168°

Given,

In the question:

Angle A and Angle B are supplementary angles.

If mA (x - 9)° and m/B= (7x + 21)°

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Now, According to the question;

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Two angles are Supplementary when they add up to 180 degrees.

Now, ∠A+∠B = 180°

So,

⇒(x - 9)˚+(7x + 21)°=180°

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For the measure of ∠B :

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∠B = 7 x 21 + 21

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Learn more about Supplementary angles at:

brainly.com/question/13045673

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5 0
1 year ago
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Sedaia [141]

Step-by-step explanation:

Now she has 6 watermelons.

4 0
3 years ago
Read 2 more answers
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inessss [21]

Answer:

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Lisa:  10=1/3

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3 years ago
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