Answer:
Brainlist pls?
Step-by-step explanation:
The Answer is B
We are given that:
t = time required for Sprinkler System A
t + 4 = time required for Sprinkler System B
Hence the rates are:
1 / t = rate for Sprinkler System A
1 / (t + 4) = rate for Sprinkler System B
The overall equation is:
1 / t + 1 / (t +
4) = 1 / 1.5
Solving for t by multiplying everything by t*(t + 4):
t + 4 + t = (1 / 1.5) (t) (t + 4)
3 t + 6 = t^2 + 4 t
t^2 + t = 6
Completing the square:
t^2 + t + 0.25 = 6 + 0.25
(t + 0.5)^2 = 6.25
t = -0.5 ± 2.5
t = -3, 2
Since time cannot be negative, therefore:
t = 2 hours
t + 4 = 6 hours
Alone, Sprinkler System A takes 2 hours while Sprinkler
System B takes 6 hours.
Again, to tell if a relation is a function, they must pass the vertical line test, draw lines down the x axis and make sure the line does not intercept the relation twice or more.
The correct answer is the one on the bottom left. You can draw any vertical lines down the graph and it would not intercept two points or more at once
Answer: x and y = 3
Step-by-step explanation:
