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Ugo [173]
3 years ago
12

Can someone explain this step by step please

Mathematics
1 answer:
kobusy [5.1K]3 years ago
3 0

Answer:

x = - 2

y = 6

Step-by-step explanation:

The best way to do this is to put - 3x in for y in the second equation.

4x - 2(-3x) = - 20        Watch the signs. You have 2 minus signs.

4x - - 6x = -20            Change - - 6x to 6x

4x + 6x = - 20              Add

10x = - 20                   Divide by 10

x = -20/10

x = - 2

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

Find y

y = - 3x

y = -3 * -2

y = 6

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what is the slope of the line that passes through the points (-7, -4) and (-11, -2) write your answer in simplest form
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We can find slope m with this formula

m=\dfrac{\Delta{y}}{\Delta{x}}

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The slope of line is -1/2.

Hope this helps.

7 0
3 years ago
If you use 128m of fencing, what is the largest possible rectangular area you can enclose? What is
klasskru [66]

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Answer:

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Step-by-step explanation:

The largest rectangular area with a given perimeter is a square. Each side of the square will be 1/4 of the fence, or 32 m.

The largest enclosed area is (32 m)² = 1024 m².

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The smallest area will be that of an enclosure consisting of a double-row of fence: 64 m long and 0 m wide.

The smallest enclosed area is (64 m)(0 m) = 0 m².

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"Whole numbers" include zero. If you want the lengths to be Natural numbers, then the smallest area will be 63 m long and 1 m wide, or 63 m².

7 0
3 years ago
A scuba diver is 30 ft below sea level. Which of the following best describes this situation?
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Reason
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