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3 years ago

3x - 3y = -32x - y = -5

Mathematics

1 answer:

Korolek [52]3 years ago

4 0

For this case we must solve the following system of equations:

$3x-3y = -3\\2x-y = -5$

To solve we follow the steps below:

We multiply the second equation by -3:

$-6x + 3y = 15$

Thus, we have the equivalent system:

$3x-3y = -3\\-6x + 3y = 15$

We add the equations:

$3x-6x-3y + 3y = -3 + 15\\-3x = -3 + 15\\-3x = 12\\x = \frac {12} {- 3}\\x = -4$

We look for the value of the variable "y":

$2 (-4) -y = -5\\-8-y = -5\\-y = -5 + 8\\-y = 3\\y = -3$

Thus, the solution of the system is given by:

$(x, y): (- 4, -3)$

Answer:

$(x, y): (- 4, -3)$

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Answer:

After finding the money we were short with, we find that Option-b, that is, $2200 is the correct option.

Step-by-step explanation:

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2 years ago

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If the gourmet shopkeeper mix 15 pounds of coffee beans which costs 3.0$ per pound with 10 pounds of coffee beans costing 4.25$ per pound.
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2 years ago

Need help Identify three solutions of the graph shown

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3 years ago

Someone help please hurry !!! ASAP

geniusboy [140]

Answer:

it's -4

Step-by-step explanation:

hope it helped!!!!!!

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3 years ago

Read 2 more answers

Brooke has to set up 70chairs in equal rows for the class talent show.But,there is not room for more than 20 rows. What are the

Zinaida [17]

Answer:

R = rows

C = columns

The chairs will be arranged in a way such that R * C $\geq$ 70

We know that R $\leq$ 20

70 / 20 = 3.5; however, you can't have half of a chair.

So find all the factors of 70 which don't exceed 20.

1, 70

2, 35

<h2>5, 14</h2><h2>7, 10</h2><h2></h2><h2>There are four ways that Brooke can set up the chairs:</h2><h2>5 rows of 14</h2><h2>7 rows of 10</h2><h2>10 rows of 7</h2><h2>14 rows of 5</h2>

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3 years ago

3x - 3y = -32x - y = -5​

3x - 3y = -32x - y = -5