Answer:
I am positive that it is A. 0.02
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Define the two numbers
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Let the first number be x.
Let the second number be y.
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Form equations and solve x and y
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x + 2y = 14 ------------------ (1)
2x + y = 31 ------------------ (2)
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Equation (1) x 2
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2x + 4y = 28 ---------------(1a)
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Equation (1a) - 2
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3y = 28 - 31
3y = -3
y = -1
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Substitute y = -1 into (1)
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x + 2(-1) = 14
x -2 = 14
x = 14 + 2
x = 16
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Answer: x =16, y = -1
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If the plain takes 15 minutes, divide 60 by 15, because 60 minutes equals 1 hour, and the train travels at 80 miles per hour. And that equals 4, so then divide 80 by 4 and that's your answer...20
Answer:
<u>Useful for this exercise:</u>
- Sum of interior angles of a triangle is 180°
- Straight angle is 180°
- Angle addition postulate
<u>Finding missing angles:</u>
- m∠1 = 180° - (57° + 72°) = 51°
- m∠2 = 90° - 72° = 18°
- m∠3 = 180° - 57° = 123°
- m∠4 = 180° - (18° + 123°) = 39°