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3 years ago

Combine the like terms to create an equivalent expression: 8n+12+(-9)-(-6n)

Mathematics

1 answer:

Scilla [17]3 years ago

6 0

Work done below:

8n+12+(-9)-(-6n)=

8n+12-9+6n=

14n+3

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3x - 3y = 9 and x + 3y = 12 <br> Elimination

Firlakuza [10]

Answer:

$x=5.25,y=2.25$

Step-by-step explanation:

We can add the two equations to eliminate the variable $y$ and solve for $x$ :

$3x-3y+x+3y=9+12$

$4x=21$

$x=5.25$

Now, we can use substitution to solve for $y$ :

$x+3y=12$ (given)

$5.25+3y=12$

$3y=12-5.25$

$=6.75$

$y=2.25$

Hope this helps :)

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3 years ago

During the big storm, 30 in. of snow fell in 7 h. Find the rate of snowfall in inches per hour.

andrew-mc [135]

30 divided by 7 is 4.2z
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2 years ago

How to find the domain and range of y=|x| ?

erastova [34]

D: (-inf, +inf)
R: [0, +inf)

That equation is the parent function of the absolute value function. To find domain, move from left to right. Look at the x-values and where the graph goes. To find range, move from bottom to top and look at the y-values. I recommend using a stick/pencil and moving it along the graph.

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3 years ago

21x cubed - 18x squared y + 24xy squared

Alexxx [7]

21x³ - 18x²y + 24xy²

Simplify!

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3 years ago

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Marianna [84]

The value of the expression is 252

Step-by-step explanation:

The expression that we have to evaluate in this problem is