Sorry I just need the points
Likely best describes the likelihood of the probability 2/3. It is not completely certain, nor is it unlikely, and it definitely cannot be impossible.
Answer: the speed of the boat in still water is 12 mph and the speed of the current is 9 mph.
Step-by-step explanation:
Let x represent the speed of the boat in still water.
Let y represent the speed of the current.
The boat travelled 252 miles downstream and the same distance upstream.
The trip downstream took 12 hours. Assuming the boat travelled with the wind when going downstream, the total speed would be (x + y) mph.
Distance = speed × time
The expression for distance travelled downstream is
252 = 12(x + y)
Dividing through by 12, it becomes
21 = x + y- - - - - - - - - - 1
The trip back took 84 hours. Assuming the boat travelled against the wind when going back(upstream), the total speed would be (x - y) mph.
The expression for distance travelled upstream is
252 = 84(x - y)
Dividing through by 84, it becomes
3 = x - y- - - - - - - - - - 2
Adding equation 1 to equation 2, it becomes
24 = 2x
x = 24/2
x = 12 mph
Substituting x = 12 into equation 1, it becomes
21 = 12 + y
y = 21 - 12
y = 9 mph
Well, first consider how many digits there are. You have 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0, depending on how you use it, that are all digits.
If you count 0 as a digit other than a place holder (0000, 0001, etc.), you would end up with ten thousand (10,000) numbers with four digits, starting with 0000, and ending with 9999. If you count 0 as nothing other than a place holder (1000, 1001, etc.), you would have nine thousand (9,000) numbers with four digits, starting with 1000.
So, depending on how you view 0, you can make up to 10,000 different numbers that contain four digits.
35. You have to plug in all the numbers to the matching variables and solve.
