The answers are D, A, and C
First of all there isn't any graphs shown in here but i will try to show u how to work it out according to the given data.
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where (x1,y1) and (x2,y2) are two points by which the line passes through.
so;
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Slope=3
There is a formula for this
Time = [Worker 1 * Worker 2] / [Worker 1 + Worker 2]
Time = 30*40 / (30+40)
Time = 1,200 / 70
Time =
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17.1428571429
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minutes
Alternate method
In 1 minute, Mark can clean (1/30) of a room
In 1 minute, Lynn can clean (1/40) of a room
Together, they can clean (1/30 + 1/40) = (7 / 120) of a room in 1 minute.
Together, they can clean one room in (120 / 7) minutes.
(120 / 7) =
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17.1428571429
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minutes.
Source:
http://www.1728.org/work.htm
Answer: I am a right isosceles
Step-by-step explanation: