<em><u>Answer:</u></em>
option A is the correct answer
4 hours for 18
7 hours for 25.50
Difference in hours: 7-4 = 3
Difference in cost: 25.50 - 18 = 7.50
7.50 / 3 = 2.50
A. They charge 2.50 per hour.
B. 2.50 x 4 = 10
18 - 10 = 8
The flat fee is 8 dollars
C. 8 + (2 x 2.50) = 13 dollars
The only solution is when y=y
x+1=x-1 subtract x from both sides
1=-1
This is never true so there are no solutions. In this case it is due to the fact that both lines have the same slope and different y-intercepts. This means that they are parallel lines that have a constant distance between them.
Answer:
0
Step-by-step explanation:
×2-2 = ×2 =4 =4-2=2 as in my thoughts it is kinda appropriate
a. Factorize the denominator:
Then we're looking for 
such that
If 
, then 
; if 
, then 
. So we have
as required.
b. Same setup as in (a):
We want to find 
such that
Quick aside: for the second term, since the denominator has degree 2, we should be looking for another constant 
such that the numerator of the second term is 
. We always want the polynomial in the numerator to have degree 1 less than the degree of the denominator. But we would end up determining 
anyway.
If 
, then 
; if 
, then 
. Expanding everything on the right then gives
which tells us 
and 
; in both cases, we get 
. Then
as required.
