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3 years ago

Out of a total of 68 students, 25% had perfect attendance for the nine weeks. How many students is this?

Mathematics

1 answer:

rodikova [14]3 years ago

4 0

68 students* (25/100)= 17 students.

There are 17 students who had perfect attendance for the nine weeks~

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Michael recorded the color of each car that passed by his office. He saw 30 blue cars and 40 green cars. What is the experimenta

Alex73 [517]

Answer:

3/7

Step-by-step explanation:

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4 years ago

Chris drove his car to the movie theater. The graph below represents Chris's speed over time, from when he left his house to whe

abruzzese [7]

Answer:

Step-by-step explanation:

Stopping at a stoplight means that Chris's speed would be zero on the graph. The times that his speed is zero are times t = 0, t = 2 min, t = 11 min, and t = 21 min. Because the graph shows his speed from the time he left his house (at t = 0) to the time he arrived at the theater (at t = 21 min), the most likely times he stopped at stoplights are times t = 2 min and t = 11 min.

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3 years ago

How to put this in an algebraic expression

likoan [24]

8%w-16%z
I think that this is the answer.

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4 years ago

Choose the possible descriptions of cross sections formed by the intersection of a plane and a rectangular prism.

xxMikexx [17]

Answer:

-rectangle

-triangle

-line segment

-point

Step-by-step explanation:

A rectangle is formed when the intercepting plane is parallel to two of the faces of the prism

A triangle is formed when the plane cuts the prism near only one vertex, it is not parallel to the faces and 3 edges are cutted

A line segment is formed when the plane "touches" only one edge of the prism

A point is formed when the plane "touches" only one vertex of the prism

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3 years ago

A dental insurance policy covers three procedures: orthodontics, filling, and extractions. During the life of the policy, the pr

Alexxx [7]

Answer: 0.71

Step-by-step explanation:

A="The policyholder needs Orthodontics"

B="The policyholder needs filling"

C="The policyholder needs extraction"

P(A)=1/2, P(AUB)=2/3, P(AUC)=3/4, P(B∩C)=1/8

The events are independents, so:

P(A∩B)=P(A)P(B), P(A∩C)=P(A)P(C) and P(B∩C)=P(B)P(C)

P(AUB) = P(A)+P(B)-P(A∩B) = P(A)+P(B)+P(A)P(B)

2/3=1/2+P(B)-1/2*P(B), P(B)=1/3

P(AUC) = P(A)+P(C)-P(A∩C) = P(A)+P(C)+P(A)P(C)

3/4=1/2+P(C)-1/2*P(C), P(C)=1/2

P(BUC)=P(B)+P(C)-P(B∩C)=1/3+1/2-1/8=17/24

P(BUC)=0.71

3 0

3 years ago