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Hoochie [10]
3 years ago
13

Mr. Rodriguez used a random sample of 20 students from each grade at Willowbrook School to determine their favorite types of rea

ding material. He made a graph of the results. What can he infer from the results?
Overall, students are less interested in reading magazines than comics.
Students are less interested in reading comics than magazines.
Students prefer magazines to books.
7th-grade students prefer books.

Mathematics
2 answers:
Kruka [31]3 years ago
7 0

Answer:

A- Overall, students are less interested in reading magazines than comics.

Gekata [30.6K]3 years ago
6 0

Answer:

Option A

Step-by-step explanation:

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A boat travels 12 km upstream and back in 1 hour 45 minutes. If the speed of the current is 3 km/h throughout, find the speed of
Elza [17]

Answer:

14.3 km/h   to 3 significant figures

Step-by-step explanation:

Let time travelling upstream be t1 hours and downstream = t2 hours.

t1 + t2 = 1.75..........................(1)

Let v  be the speed of the boat in still water.

12 / t1 = v - 3.........................(2)

12 /  t2 = v + 3........................(3)

From (1) and (3) , substituting for t2:-

12 / (1.75 - t1) = v + 3 ..................(4)

Subtract:-   (2) - (4):-

12 / t1 - 12 / (1.75 - t1) = -6

12(1 .75 - t1) - 12t1 = -6t1(1.75 -  t1)

21 - 12t1 - 12t1 = -10.5t1 + 6t^2

6t1^2 + 13.5t1 - 21 = 0

Solving this gives t1 = 1.058 hours

Therefore the speed in still water (v)  = 12/1.058 + 3 = 14.3 to 3 sig figs

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3 years ago
A car travelled from A to B at a speed of 30km/h and returned from B to A at 60 km/h. What was the average speed for the whole t
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1/15 plus 1/5 plus 1/3 is equals to?
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Answer:

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39 is 150% of what number?
krek1111 [17]

Answer:

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Step-by-step explanation:

Pretty self-explanatory.

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1. Johana works in the crime lab at the New York City
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Oh I forgot to add in x represents a woman's shoe size and y represents the estimated likely height of the woman in inches. I hope that will be more helpful, and if not could you provide an example of what you mean exactly just to get a general idea of it thoroughly thank you

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3 years ago
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