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Elis [28]
3 years ago
14

Solve the system of linear equations using elimination.

Mathematics
2 answers:
GarryVolchara [31]3 years ago
8 0

<u>Answer:</u>

C) (−3, 6)

<u>Step-by-step explanation:</u>

10x + 7y = 12 ___ (−3, 6)

10×(-3) + 7×6 = -30 + 42 = 42 - 30 = 12

8x + 7y = 18 ___ (−3, 6)

8×(-3) + 7×6 = -24 + 42 = 42 - 24 = 18

Lisa [10]3 years ago
3 0

Answer:

C. (-3,6)

Step-by-step explanation:

Take 10x + 7y = 12 as first equation and 8x + 7y = 18 as second equation.

Subtracting both equations, you will get

10x + 7y - 8x - 7y = 12 - 18

2x = -6

x = -3

Substitute value of 'x' in any of the given equation :-

10x + 7y = 12

10 * -3 + 7y = 12

7y = 12 + 30

y = 42/7

y = 6

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Maureen tracks the range of outdoor temperatures over three days. She records the following information.
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<h2>Hello!</h2>

The answer is:

The correct option is the third option;

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<h2>Why?</h2>

To find which of the options expresses the intersection of the three days as an inequality in terms of temperature "t" we need to find an inequality which starts at the lowest temperature (greater or equal) and finish at the highest temperature (less or equal).

So, we have that the lowest temperature is -23°F and the highest temperature is 50°F, there are two options for that range, but we need to consider that the temperature will range from -23° to 50°, so, the correct option is the third option;

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We can see that the inequality express that the temperature will range from -23°F being greater or equal than that, to 50°F being less or equal than that.

Have a nice day!

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4 years ago
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area of circle : πr²

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3 years ago
What fraction is equivalent to the expression 4/ 8+2/8+1/8?
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