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BigorU [14]
3 years ago
7

In a math class with 20 students, a test was given the same day that an assignment was due. There were 11 students who passed th

e test and 15 students who completed the assignment. There were 9 students who passed the test and also completed the assignment. What is the probability that a student chosen randomly from the class failed the test and did not complete the homework?
Mathematics
1 answer:
larisa [96]3 years ago
8 0

Answer: 3/20 or .15

Step-by-step explanation:

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A student claims that the rectangular point below can be represented by the
Sladkaya [172]

Since we don't have a figure we'll assume one of them is right and we're just being asked to check if they're the same number.  I like writing polar coordinates with a P in front to remind me.

It's surely false if that's really a 3π/7; I'll guess that's a typo that's really 3π/4.

P(6√2, 7π/4) = ( 6√2 cos 7π/4, 6√2 sin 7π/4 )

P(-6√2, 3π/4) = ( -6√2 cos 3π/4, -6√2 sin 3π/4 )

That's true since when we add pi to an angle it negates both the sine and the cosine,

cos(7π/4) = cos(π + 3π/4) = -cos(3π/4)

sin(7π/4) = sin(π + 3π/4) = -sin(3π/4)

Answer: TRUE

3 0
3 years ago
HELP ME PLZ ILL MARK YOU BRAINLIEST!!! Find the answers to the following multiplication problems without using a calculator, Red
LiRa [457]

Answer:

Ok I gotchu!

5/16 I think-

Step-by-step explanation:

5 0
3 years ago
3. A train travels 20 km at a uniform speed of 60 km/h and the next 20 km at a uniform speed of 80km/h. Calculate its average sp
34kurt

Answer:

Given,

Distance traveled = 20 km

Speed = 60 km/h

So, timetaken=DistanceSpeed=2060=13h

For the next journey

Distance traveled = 20 km

Speed = 80 km/h

So, timetaken=DistanceSpeed=2080=14h

Now,

Total distance traveled = 20 + 20 = 40 km

Total time taken = 13+14=712

We know,

Averagespeed=TotaldistancetraveledTotaltimetaken=40712=68.5 km/h

Hence the average speed of the train is 68.5 km/h

3 0
2 years ago
What is the slope of the line represented by the equation y = - 1/2x + 1/4
snow_lady [41]

Answer:

The slope is -1/2

Step-by-step explanation:

-1/2 is a negative slope. Down 1 to the right 2

7 0
4 years ago
Question 3 A school wants to know what type of new food to add to the cafeteria menu for next year that most students will like.
Alik [6]
Yes because if you are asking every 4th kid then you are have a chance of one of of four

8 0
3 years ago
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