Well I don't know !
Let's check out the choices:
A). 3a - 4b = 21, a=0, b=7
3(0) - 4(7) = 21
0 - 28 = 21 Nope. That's not true.
B). 3a - 4b = 21, a=-3, b=2
3(-3) - 4(-2) = 21
-9 + 8 = 21
-1 = 21 Nope. That's not right.
C). 3a - 4b = 21, a=-2, b=-3
3(-2) - 4(-3) = 21
-6 + 12 = 21
6 = 21 Nope. That's not it.
Only one choice left.
This one had better be it:
D). 3a - 4b = 21, a=7, b=0
3(7) - 4(0) = 21
21 - 0 = 21
21 = 21 Yay ! That's it !
Answer:
In 1 hour water flowed out =
gallons
Step-by-step explanation:
Given as ,
The quantity of water flowed out of tank = 18
gallons
=
gallons
The time spend in flowing water out of tank = 4
hours
=
hours
∵ In
hours , water flowed out = 
∴ In 1 hours , water flowed out = 
So, in 1 hour water flowed out =
gallons Answer
answers for 5 and 6
5) C
6) B
Step-by-step explanation:
hope this helped
Answer:
5
Step-by-step explanation:
The number or fraction by the x is always the slope
Answer:
Shannon has to make 41 trips to cycle a total of 50 kilometers.
Step-by-step explanation:
Given that
Shannon has cycled 9 kilometers this year
Let x be the number of trips that Shannon will make during the year
As she cycles 1km per trip, the total distance in trips will be: 1x
She has to cycle 50 kilometers in a year so the equation for this problem is:

Solving this equation will give us the number of trips she has to make

Hence,
Shannon has to make 41 trips to cycle a total of 50 kilometers.