Because infedecimals. Basically 1 -.99999.... Is a number so close to zero it is impossible to define. If this were infanct the case however and a number existed that was not 0 and not 0 it would wreck mathematics so infedecimals exist only theoretically. So .999... Is equal to 1 practically but not theoretically.
The two sizes chosen for this item are a quart and one gallon.
The first one is advantageous because when it is desired that this be brought some place, it will not be very bulky and not heavy because among the given, this is the smallest. Also, one gallon can be chosen because it does serve many people at a relatively lower price than the other given.
x in (-oo:+oo)
2/7 = x/14 // - x/14
2/7-(x/14) = 0
2/7-1/14*x = 0 // - 2/7
-1/14*x = -2/7 // : -1/14
x = -2/7/(-1/14)
x = 4
x = 4
i hope this helps
Answer:
Step-by-step explanation:
X+y=-1
X-y=7
Ys are additive inverse’s.
X+x+y-y=7-1
2x=6
X=3
Plug x=3 into x+y=-1
3+y=-1
-3 both sides
Y=-4
Answer: 2.1 hours.
Step-by-step explanation:
Given , Time taken by the first pipe to fill a tank = 3 hours
Time taken by the second pipe to fill the tank = 7 hours
If both pipes were used at the same time, then the time taken (t) by both of them to fill the tank ( together) will be :-
Therefore, time taken to fill the tank = 2.1 hours.