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kotykmax [81]
2 years ago
7

10) Choose the solution for each linear system.

Mathematics
1 answer:
hodyreva [135]2 years ago
8 0

Answer:

<h2>10.  C. (2, -1)</h2><h2>11.  B. (-2, -4)</h2>

Step-by-step explanation:

10.

\left \{ {{x-2y=4} \atop {4x+2y+6}} \right.

The y values cancel out if you add the equations

5x = 10

x = 2

plug in x

2 - 2y = 4

-2y = 2

y=-1

Answer: C. (2, -1)

11.

\left \{ {{6x-2y=-4} \atop {-4x+3y=-4}} \right.

In order to get terms to cancel out, multiply the top by 3 and bottom by 2

\left \{ {{18x-6y=-12} \atop {-8x+6y=-8}} \right.

The y values cancel out if you add the equations

10x = -20

x = -2

plug in x

6(-2) - 2y = -4

-12 - 2y = -4

-2y = 8

y = -4

Answer: B. (-2, -4)

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<u>Reasoning:</u> To solve this divide 18 by 20

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2 years ago
Please help, algebra is annoying
padilas [110]
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7 0
3 years ago
Consider the following expression<br> 5(7a+2)(1+6)<br> Select all of the true statements below.
shtirl [24]

Answer:

a and d are both true. The rest are not.

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1 and 6 are like terms. They are both integers. They can be combined. This statement is true.

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===========================================

The others are all false for one reason or another

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8 0
1 year ago
Eileen and michelle scored 48% of their teams points. If their team had a total of 50 points , how many points did they score?Ex
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To find how much is 48% of 50:

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2,400 / 100
24 goals where scored by Eileen.


Hope it helped,

Happy homework/ study/ exam!

4 0
2 years ago
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