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larisa86 [58]
3 years ago
9

a class survey showed 8 out of 25 students had plans to travel over spring break. how many students out of the 400 students in t

he entire school would you expect to be traveling over spring break?
Mathematics
1 answer:
tangare [24]3 years ago
5 0
Traveling : total
8 : 25
x : 400 

25 x 4 = 400 so 8 x 4 = 40 so the answer is 40. 
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Explain what each of the following sample correlation coefficients tells you about the relationship between the x and y values i
Alchen [17]

Answer: The description are as follows:

Step-by-step explanation:

Correlation coefficients is a statistical measure that measures the relationship between the two variables.

(a) r = 1, it means that there is a Perfect positive relationship between the two variables. If there is positive increase in one variable then other variable also increases with a fixed proportion.

(b) r = -1, it means that there is a perfect negative relationship between the two variables. If there is positive increase in one variable then other variable decreases with a fixed proportion.

(c) r = 0, this is a situation which shows that there is no relationship between the two variables.

(d) r = 0.86, this is a situation  which shows that there is a fairly strong positive relationship between the two variables.

(e) r = 0.06, it is nearly zero which represents that either there is a very minor positive relationship between the two variables or there is no relationship between them.

(f) r = -0.89,  this is a situation  which shows that there is a fairly strong negative relationship between the two variables.

6 0
3 years ago
Andrew fish tank holds 144 gallons of water. To clean the tank, he drains the water at a rate the water at a rate of 6 gallons p
Kobotan [32]

Answer:

8 minutes

Step-by-step explanation:

Since the level of the tank needs to be at two-thirds its original level, then this means that Andrew needs to drain only one-third of the fish tank. Therefore the amount of time it would take can easily be solved with this 2-step equation...

6t = 144 * \frac{1}{3} .... first multiply the right side of the equation

6t = 48   ... next divide both sides by 6

t = 8

Finally, we can see that it will take Andrew 8 minutes to drain the tank to two-thirds of its original level.

4 0
3 years ago
1) Evaluate the following expressions.show your work <br> a) 7(m - 8) for m = -4
Akimi4 [234]

Answer:

-84

Step-by-step explanation:

Since m=-4, we can plug -4 into the expression and use PEMDAS

7(m - 8)

7((-4)-8)

7(-12)

-84

4 0
3 years ago
6. a- 45/8= 2 6/7.. what does a =​
frozen [14]

Answer:

-2.76785714286

Step-by-step explanation:

I think that a equals to -2.7678571428

Anyways heyy!!!:)

8 0
3 years ago
Help please thanks.......
stiv31 [10]

Answer:

D

Step-by-step explanation:

when x=0,y=6*2^0=6*1=6

6 0
3 years ago
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