2 years ago

Which phrase is a description of 3n + 5?

Mathematics

1 answer:

erica [24]2 years ago

6 0

Answer:

If I have the options and then i'll answer the question, please comment them

Step-by-step explanation:

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Solve the system of equations 3x – 3y = 30 and 2x + y = 11 by combining the equations.

Andreas93 [3]

Times bottom equation by 3 and top by 2 to get the same coefficient of x
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6x+3y=33
Minus the bottom by the top
-9y=27
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substitute this in to one of the equations
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add 3 to both sides
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648/180 reduced? In fractions

Finger [1]

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2 years ago

"Rebecca walks 100 feet in a straight line. She then turns 20 degrees to her left and walks another 100 feet, and then turns 20

iragen [17]

Answer:

1,800 ft

Step-by-step explanation:

Rebecca will walk in the pattern of a regular polygon with 'n' sides and internal angles of 160 degrees (180 at a straight line - 20 degrees from each turn).

The equation that describes the internal angle of a regular polygon is:

$A = \frac{(n-2)*180}{n}$

For A = 160 degrees:

$160n=(n-2)*180\\(180-160)n=360\\n=18\ sides$

If each side is 100 ft long, the total distance that Rebecca has walked is:

$d = 18*100\\d=1,800\ ft$

She walked 1,800 ft.

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2 years ago