MATHEMATICS MIDDLE SCHOOL

Value of x in the solution to the system of equations.
6x+3y=13
3x-y=4

Answers

Answer 1
Answer: The two easiest ways to solve a system of equations (in my opinion) are to add the equations together while getting rid of a variable, or solving for a variable in one equation and plugging it into another. The latter is the method I will use.

3x - y = 4 (solve for y)
3x = 4 + y
3x - 4 = y
y = 3x - 4 

Now we can plug y into the other equation:
6x + 3y = 13
6x + 3(3x - 4) = 13
6x + 9x - 12 = 13
15x = 25
x = 25/15
x = 5/3
The answer is x = 5/3

If you ever needed to find y as well, you can plug this into either equation to find y.
3x - y = 4
3(5/3) - y = 4
5 - y = 4
y = 1

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What is 4x^2+4-5x+x-2x^+8

Answers

combine like terms
move the like terms together (x^2 with x^2, x with x, number wiht numbers)
4x^2-2x^2-5x+x+4+8
2x^2-4x+12
2 times (x squared-2x-2)

Round 939,515 to the nearest ten

Answers

The number  939,515 rounded to the nearest tens is 939520.

What is rounding off of numbers?

We round off numbers to make them easier to remember and it also keeps their value approximately to the place it has been rounded off.

To round off any number to any place we'll look for the digit next to that place and if it is equal to or greater than 5 we'll add one to the previous digit and make all the digits after it zeroes and if the digit is less than 5 we do not add one to the preceding digit and simply make all the digit after it to zeroes.

Given, A number 939515 and we have to round it to the nearest ten.

To round this number to the nearest ten we'll look at the digit at the unit's place.

The digit at the unit place is 5 so we'll add 1 to the tens digit and make the unit digit zero.

Therefore the number 939515 rounded to the nearest tens place is

939520.

learn more about rounding of numbers here :

brainly.com/question/13391706

#SPJ2

Answer:

939,520

Step-by-step explanation:

You round up because you have a 5 in the tens place and as the saying goes: "Five or more up the score, four or less let it rest"

Which would you use to compare 11/12 and 5/6 a common numerator or a common denominator

Answers

A common denominator (the number on the bottom). To compare (add, subtract) two fractions, you must have the same number on the bottom.
The common denominator.

What is the sum of 1/2 and 1/3

Answers

1/2+1/3=
3/6+2/6=5/6
The answer is 5/6.
the answer is 0.833333 repeating. you get that because
1/2=0.5  and 1/3=0.33 repeated then you add them together and get 0.8333 repeated.

I am having some trouble what is 85% of 1200


Answers

85% of 1200 is 1020. You can do 85*1200% on a calculator and the answer should be the same.
I think the answer is 1,020 because if u do on the calculator 85% *1,200=1,020

Sole at least one. Thanks!​

Answers

Answer:

the answer to 43 is 2/5 = 4/10
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