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Mademuasel [1]
3 years ago
10

What is the solution of 3x + y = 9 and 3x − 5y = 15?

Mathematics
1 answer:
erma4kov [3.2K]3 years ago
5 0

Answer:

Multiply the first equation by five to yield, 15x + 5y = 45. Add this equation to the second equation from the given,

                                      15x + 5y = 45

                            +         3x - 5y = 15

The answer would be 18x = 60. The value of x is 10/3. Therefore, the answer to this item is letter A.

Read more on Brainly.com - brainly.com/question/1504559#readmore

Step-by-step explanation:

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weqwewe [10]

Answer:

Step-by-step explanation:

start with 0

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round 2: wins 28 1/2

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0 - 3 1/2 + 28 1/2 - 3 1/2 =

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3 years ago
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Kryger [21]

Answer:

D) 12x² - 20x + 7

Step-by-step explanation:

Use FOIL when multiplying 2 binomials...

FOIL is Firsts, Outsides, Insides, Lasts.  It's the order in which you multiply the numbers in the binomials...

(2x - 1)(6x - 7)    

Firsts:  (2x)(6x) = 12x²

Outsides:  (2x)(-7) = -14x

Insides:  (-1)(6x) = -6x

Lasts:  (-1)(-7) = 7

Now add them up...

12x² - 14x - 6x + 7

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Step-by-step explanation:

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