Jana and her friend bought 4 hamburgers, 3 orders of fries, and 2 milk shakes for $3 each. they paid for the food with $20. which part of the equation represents the total cost of their items? justify your answer.
c = $20 - (4h + 3f + 6)
a) $20; they paid $20 for the food.
b) (4h + 3f); find the total cost by adding the price of 4 hamburgers to the price of 3 fries
c) 4h + 3f + 6; find the total cost by adding the price of 4 hamburgers to the price of 3 fries to the price of 2 milkshakes.
d) c = 20 - (4h + 3f + 6); find the total cost by subtracting the price of 4 hamburgers to the price of 3 fries to the price of 2 milkshakes.

For this case we have the following variables:

h: Cost of each hamburger bought by Jana and her friend

f: Cost of each order of potato chips bought by Jana and her friend

b: Cost of each milkshake

If you bought 4 hamburgers, 3 orders of potatoes and 2 milkshakes, you have a cost of:

It is known that each shake costs $ 3, so$

Substituting we have:

Thus, the total cost is given by:

Option C

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers