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tekilochka [14]
4 years ago
9

Use the elimination method to solve the system of equations. Choose the

Mathematics
1 answer:
lesantik [10]4 years ago
6 0

Answer:

The answer is B.

Step-by-step explanation:

When Elimination method is applied, you have to eliminate one of the variables from both equations. Firstly, both equations contain 4y so you can subtract it :

7x + 4y = 39 -  -  - (1)

2x + 4y = 14 -  -  - (2)

(1) - (2)

7x + 4y - 2x - 4y = 39 - 14

5x = 25

x = 25 \div 5

x = 5

Next, you have to substitute x = 5 to any equations. I will choose to put in (2) :

substitute \: x = 5 \: into \: (2)

2(5) + 4y = 14

10 + 4y = 14

4y = 14 - 10

4y = 4

y = 4 \div 4

y = 1

Therefore, put your answer in coordinate form :

x = 5 \\ y = 1

(5,1)

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The sum of four consecutive integers is 286
Rudik [331]
Solve it like this. x + (x+1) + (x+2) + (x+3) = 286
 4x + 6= 286
4x= 280 
x = 70
70+71+72+73=286 
4 0
3 years ago
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(<br> 1<br> +<br> 3<br> )<br> 2<br> −<br> 10<br> ÷<br> 2<br> =
Burka [1]

Answer:

3

Step-by-step explanation:

1+3 equals 4, 4 times 2 is 8, 8-10 is -2, -2 divided by 2 is 3

3 0
3 years ago
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What is the solution to y-7&gt;3+2y
Alex17521 [72]

Solving:

-7 + y = 3 + 2y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-2y' to each side of the equation.

-7 + y + -2y = 3 + 2y + -2y

Combine like terms: y + -2y = -1y

-7 + -1y = 3 + 2y + -2y

Combine like terms: 2y + -2y = 0

-7 + -1y = 3 + 0

-7 + -1y = 3

Add '7' to each side of the equation.

-7 + 7 + -1y = 3 + 7

Combine like terms: -7 + 7 = 0

0 + -1y = 3 + 7

-1y = 3 + 7

Combine like terms: 3 + 7 = 10

-1y = 10

Divide each side by '-1'.

y = -10

Hope it helps. (:

6 0
4 years ago
the phrase “is a function of” gets used in non-mathematical speech as well as mathematical mathematical speech in sentences like
Tanya [424]

Answer:

Step-by-step explanation:

This is a very interesting question. I'm going to answer no, but don't take that to mean that the question is not worthwhile. It is.

In math, function has the meaning of considering ordered pairs. Here are 4 such ordered pairs.

(1,2)

(2,4)

(1,-3)

(5,9)

They are really not related to one another except all are ordered pairs.

Here's the math definition. If one of the x values (1,2,1,5) has more than 1 y value, you do not have a function.

1 has 2 y values,  2 and -3. Therefore the 4 points do not form a function

if you change the first (1,__) to 0 and your ordered pair becomes (0,2), all is well and you do have a function.

Whether you understand this or not, you have to see that a math function and a biology function are very different. The math function has numbers and those numbers have to obey a rule.

The biology function seems to be saying that how your mom and dad brought you up will determine what foods you like.

Those two uses are very different. How your mom brought you up is related to food. It could be anything else like "Being a knife carrying gang member is a function of where you live."

4 0
3 years ago
What is the solution of the systrem 2x - y = -7 4x - y = -4
PSYCHO15rus [73]

Answer:

x=3/2, y=10. (3/2, 10).

Step-by-step explanation:

2x-y=-7

4x-y=-4

--------------

-2(2x-y)=-2(-7)

4x-y=-4

---------------------

-4x+2y=14

4x-y=-4

-----------------

y=10

2x-10=-7

2x=-7+10

2x=3

x=3/2

4 0
3 years ago
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