If dave is reading 3.5 then the answer is Dave and he read 170 more pages then Jack.
Step-by-step explanation:
3.5 pages x 60 minutes = 210 pages per hour
210
- 40= 170
170 + 40= 210 so thats how I know 170 is the answer.
I think you have to combine like terms to solve this one. (6d - 3d) + (5 - 2) = 3d + 3
Answer:
pretty sure it's B, its just really hard to see
Step-by-step explanation:
Answer:
See explanation below.
Step-by-step explanation:
The prime numbers are bold:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27 28 29 30 31
a) We can see that as we go higher, twin primes seem less frequent but even considering that, there is an infinite number of twin primes. If you go high enough you will still eventually find a prime that is separated from the next prime number by just one composite number.
b) I think it's interesting the amount of time that has been devoted to prove this conjecture and the amount of mathematicians who have been involved in this. One of the most interesting facts was that in 2004 a purported proof (by R. F. Arenstorf) of the conjecture was published but a serious error was found on it so the conjecture remains open.
Let x represent the speed of of boat.
We have been given that the river current is 3 miles per hour.
The speed of boat upstream will be
.
The speed of boat downstream would be
.

We have been given that you travel 2 miles downstream to a marina for supplies, and then you travel 3 miles upstream to a dock.
We can represent this information in an equation as:

Since the speed of the boat is 18 miles per hour, so we will substitute
in above equation and solve for time.







Since time is in hours, so let us convert our given time in minutes.
1 hour = 60 minutes.


Rounding to nearest tenth of minute.

Therefore, it will take approximately 17.7 minutes for the boat to take the trip.