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NeTakaya
4 years ago
6

5x-2y=14, 2x-y=5 substitution

Mathematics
1 answer:
vitfil [10]4 years ago
7 0

Answer:

The solution set is (4, 3)

Step-by-step explanation:

To solve by substitution, start by solving the second equation for y.

2x - y = 5

-y = -2x + 5

y = 2x - 5

Now that we have this, put that expression in for y in the first equation and solve for x.

5x - 2(2x - 5) = 14

5x - 4x + 10 = 14

x + 10 = 14

x = 4

Now that we have the value of x, input it into either equation and solve for y.

2x - y = 5

2(4) - y = 5

8 - y = 5

-y = -3

y = 3

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To get this answer, we multiply the values given to us

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6 0
3 years ago
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olya-2409 [2.1K]
Hello! So, this question is in the form of ax² - bx - c. First thingd first, let's multiply a and c together. c = -8 and a = 5. -8 * 5 is -40. Now, let's find two factors that have a product of 40, but a sum of 18. If you list the factors, you see that 2 and 20 have a product of 40, but  2 - 20 is -18. The factors we will use are -2 and 20.

How to factor it:

For this question, you can use something called a box method and factor it by finding a factor of each column and row. Just make 4 boxes and put 5x² on the top left and -40 on the bottom left box. Put 2x on the top right box and -20x on the bottom left box. Now, factor out for each row and column. The factors should be 5x + 2 for the top part and x - 4 for the side. It should look like (5x + 2)(x - 4). Let's check it. Solve it by using the FOIL method and you get 5x² - 20x + 2x - 8. Combine like terms and you get 5x² - 18x - 8. There. The answer is B: (5x + 2)(x - 4)

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6 0
4 years ago
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PLEASE HELP I HAVE 5 MIN TO TURN THIS IN!!!!
Lady_Fox [76]

Answer:

  • False

Step-by-step explanation:

<u>Perimeter of garden A  is </u>

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6 0
3 years ago
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Answer:

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Step-by-step explanation:

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\frac{2}{5} = 0.40

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3 years ago
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Step-by-step explanation:

I think its right

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