This table shows a linear relationship between the amount of water in a tank and time. time (minutes) water (gallons)
0 40
2 30
4 20
Which of these statements is true?
A. The water in the tank is increasing at a rate of 10 gallons per minute.

D. The water in the tank is decreasing at a rate of 5 gallons per minute

C. The water in the tank is decreasing at a rate of 10 gallons per minute.

D. The water in the tank is increasing at a rate of 5 gallons per minute.

I think the answer is D (The water in the tank is decreasing at a rate of 5 gallons per minute).

Step-by-step explanation:

As we can see here, the water in the tank is decreasing at a rate of 10 gallons per 2 minutes.

That would be 2/10. Reduce 2/10 and you will get 1/5. So the final answer would be that the water in the tank is decreasing at a rate of  5 gallons per minute.

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages