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STatiana [176]
4 years ago
5

There are 24 students in a science class.Mr.Sato will give each pair of students 3 Magnets.So far,Mr.Sato has given 9 pairs of s

tudents their 3 magnets.How many more magnets does Mr.Sato need so that each pair of students has exactly 3 magnets?
Mathematics
1 answer:
Flauer [41]4 years ago
8 0

Answer:

Mr. Sato needs 9 more magnets.

Step-by-step explanation:

The 24 students will form 12 pairs. The total number of magnets needed is 12*3 = 36. Mr. Sato  gave out 9*3=27 magnets already and so he will need 36 - 27 = 9 more magnets.

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Line segment JM has endpoints with coordinates -2 and 14 on a number line. Points K and L are on segment JM. K has a coordinate
Murljashka [212]

Answer:

B. \frac{25}{64}

Step-by-step explanation:

Please find the attachment.  

We have been given that line segment JM has endpoints with coordinates -2 and 14 on a number line. Points K and L are on segment JM. K has a coordinate of 2 and point L has a coordinate of 8.

The probability that the first point is positioned on JL would be \frac{10}{16} as there are total 10 points on JL as L is at point 8 and J is at point -2 so (8--2=8+2=10). Total number of points on the number line JM is (14--2=14+2=16)  

The probability that second point is not placed on KL would be:

P(\text{The point is not on KL)}=1-\text{probability that point is on KL}

P(\text{The point is not on KL)}=1-\frac{\text{Total points on KL}}{\text{Total points on JM}}

P(\text{The point is not on KL)}=1-\frac{(8-2)}{16}

P(\text{The point is not on KL)}=1-\frac{6}{16}

P(\text{The point is not on KL)}=\frac{16-6}{16}

P(\text{The point is not on KL)}=\frac{10}{16}

\text{The probability of getting 1st point on Jl and second point is not on KL}=\frac{10}{16}\times \frac{10}{16}

\text{The probability of getting 1st point on Jl and second point is not on KL}=\frac{5}{8}\times \frac{5}{8}

\text{The probability of getting 1st point on Jl and second point is not on KL}=\frac{25}{64}

Therefore, our desired probability will \frac{25}{64} and option B is the correct choice.

5 0
3 years ago
What is the value of x in the equation 3x- 4y =65, when y= 4?
Alexus [3.1K]
3x-4y=65

3x=65+4y

x=(65+4y)/3, when y=4

x=(65+4*4)/3

x=(65+16)/3

x=81/3

x=27
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3 years ago
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According to this graph, how fast is the train moving in miles per hour?
levacccp [35]

Answer:33mins

Step-by-step explanation:

4 0
4 years ago
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Graph :) :) :) :) If you need it
ArbitrLikvidat [17]
Thanks I’ll get to use this to help me out
6 0
3 years ago
You move right 7 units and left 4 units. You end at (0, -2). Where did you start?
Afina-wow [57]

Answer:

(-3, -2)

Step-by-step explanation:

1. you moved right 7 units

2. you moved left 4 units

3. you ended up in (0, -2)

if you reverse it,

1. you start in (0, -2)

2. you move right 4 units (4, -2)

3. you move left 7 units (-3, -2)

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2 years ago
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