Answer:

Step-by-step explanation:
THe slope of a straight line is given by the formula:

Where
m is the slope
x_1 and y_1 are the first coordinate pair points [(2,3)]
x_2 and y_2 are the second coordinate pair point [(8,6)]
So, we know that:
x_1 = 2
x_2 = 8
y_1 = 3
y_2 = 6
Now we substitute and find the value of slope to be:

They would cost the same amount by day 2. day 1 for car a is $45.50. day 1 for car b is $40. day 2 for car a is $60. day 2 for car b is also $60.
I think this is going to help you understand the concept and hope that the answer is correct. Thanks for understanding.
Answer:
d = C - 2/3
Step-by-step explanation:
Subtract 2/3 from both sides of the equation:
C = d + 2/3
-2/3 -2/3
-----------------
C - 2/3 = d
Let x be the original number of chocolates:-
x - (2/3)x - (1/5)(x - (2/3)x) = 12
x - (2/3)x - (1/5)x + (2/15 )x = 12
15x - 10x - 3x + 2x = 180
4x = 180
x = 45
original amount of chocolates = 45