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3 years ago

Use elimination method to solve the system of equations choose the correct ordered pairs 3x-4=-30 3x+2y=6

Mathematics

1 answer:

DiKsa [7]3 years ago

4 0

The answer is C(-2, 6).

I think you forgot the y in the first equation (with the -4.

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Inverse of f(x)=3x-4

aniked [119]

Answer:

$\large\boxed{f^{-1}(x)=\dfrac{x+4}{3}=\dfrac{1}{3}x+\dfrac{4}{3}}$

Step-by-step explanation:

$f(x)=3x-4\to y=3x-4\\\\\text{exchange x to y and vice versa}\\\\x=3y-4\\\\\text{solve for y}\\\\3y-4=x\qquad\text{add 4 to both sides}\\\\3y=x+4\qquad\text{divide both sides by 3}\\\\y=\dfrac{x+4}{3}$

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3 years ago

use the image below to describe at least three different ratios written in simplest form. Include at least one part to part rati

oksano4ka [1.4K]

Answer:

charts huh

Step-by-step explanation:

678/980=x1280 hope this helps

8 0

3 years ago

Read 2 more answers

F(x)=2.8x-12 and g(x)=5.8x+9

xxMikexx [17]

Hi, there!

I'm not sure what you want to solve in these equations. Please provide me with more details. I am sorry if you were looking for answers to the question, but I simply do not know what you are asking for.

Thanks!

6 0

3 years ago

use elimination to solve. For a production of sweeney Todd in Las Vegas, orchestra seats cost $42 and mezzanine seats cost $25.

lidiya [134]

They bought 8 orchestra seats and 6 mezzanine seats.

Step-by-step explanation:

Cost of one orchestra seat = $42

Cost of one mezzanine seat = $25

No. of people = 14

Amount spent = $486

Let,

x be the number of orchestra seats

y be the number of mezzanine seats

According to given statement;

x+y=14 Eqn 1

42x+25y=486 Eqn 2

Multiplying Eqn 1 by 25;

$25(x+y=14)\\25x+25y=350\ \ \ \ Eqn\ 3$

Subtracting Eqn 3 from Eqn 2 to eliminate y;

$(42x+25y)-(25x+25y)=486-350\\42x+25y-25x-25y=136\\17x=136$

Dividing both sides by 17

$\frac{17x}{17}=\frac{136}{17}\\x=8$

Putting x=8 in Eqn 1

$8+y=14\\y=14-8\\y=6$

They bought 8 orchestra seats and 6 mezzanine seats.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

5 0

3 years ago

Can someone please simplify 81^5 = 3^x

artcher [175]

If you are trying to find the answer for x it would 20

5 0

3 years ago