Mathematics, 22.09.2019 00:50, wavy419

Maria plots the locations of 4 places on a coordinate grid as given below.
her house is at (−4, 9).
her school is at (−4, 3).
the community center is at (1, 3).
the grocery store is at (−4, −8).
part a: use absolute values to calculate the distance in units from maria's house to her school. show your work.
part b: is the total distance from maria's house to the school to the grocery store greater than the total distance from maria's house to the school to the community center? justify your answer.

Answers: 1

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Part A: Her house and school are both on -4x so to find the distance it must be on the y values witch are 9 and 3. To get the distance you must subtract 3 from 9. With this you get 6.
Part B: The distance from her house to the school is 6 units. The distance from her school to the grocery store is 11 units. The total distance there is 17 units . The distance from her house to the school is 6 units. The distance from her school to the community center is 5. The total distance there is 11 units. The statement is true.

answered: sebastien14

Well, A is just 2. Not sure how to use absolute values to do it, but its just 2 units away. They're on the same x value so the only thing you need to do is count the y-distance. 5-3 = ? B. For the first part, house -> school -> store is again just adding y distances. |5 - 3| + |3 - (-9)| = ? And for the second part. house -> school -> community(this time school and community are on same y axis so just add the distance in x distance) |5 - 3| + |(-4) - 6| = ? Conclusion: ?

answered: Guest

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

answered: Guest

a) one student is chosen from classroom a, then a student is chosen from classroom b.

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b. this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes. this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes. this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes. this makes them dependent events.