500*40%=200
500-200=$300 is the actual cost with the discount
Y = mx + b
y - b = mx
(y - b) / x = m
so its : m = (y - b) / x.....or m = (y/x) - (b/x)
Answer:
Step-by-step explanation:
We have to write an equation which represents the area of Felicia covered y in terms of the number of tiles she used.
Let x= Number of tiles
y=Area covered by Felicia's tile





The ratio of x and y remains constant.Therefore, it is direct proportion .
Equation of direction proportion is given by

Where
k=The value of ratio of x and y
x and y are variables
We have k=9
Substitute the values in the equation
Then, we get



This is required equation which representing the area of Felicia covered y in terms of the number of tile she used x.
Answer:
this is the answer 25
Step-by-step explanation:
i guessed
Step-by-step explanation:
Total money = 15.40 × 5 = 77
Ethan gets 5 boxes for 77