A is correct because if you subsitute 5 for d or days, you get 140 for both equations
B is obviously wrong because a positive number of days +20 is not more than 5 for charlie's car rentals
C is wrong because we saw that in 5 days, the car companies earn equal ammounts
D is wrong because we saw that in 5 days, the car companies earn equal ammounts
Answer: 12 students
Step-by-step explanation:
Let X and Y stand for the number of students in each respective class.
We know:
X/Y = 2/5, and
Y = X+24
We want to find the number of students, x, that when transferred from Y to X, will make the classes equal in size. We can express this as:
(Y-x)/(X+x) = 1
---
We can rearrange X/Y = 2/5 to:
X = 2Y/5
The use this value of X in the second equation:
Y = X+24
Y =2Y/5+24
5Y = 2Y + 120
3Y = 120
Y = 40
Since Y = X+24
40 = X + 24
X = 16
--
Now we want x, the number of students transferring from Class Y to Class X, to be a value such that X = Y:
(Y-x)=(X+x)
(40-x)=(16+x)
24 = 2x
x = 12
12 students must transfer to the more difficult, very early morning, class.
Answer:
2b+1j=?
Step-by-step explanation:
2b represent 2 granola bars
You most likely mean Newtons method but imagine the interval in which the solution may exist and begin there as a place to start.
