First turn the whole numbers into mixed fractions:
1 1/2
multiply the whole number by the denominator then add it to the numerator which will make 3/2
doing the same thing on 1 2/3, you get 5/3
finding the LCM of 5/3, 3/2 and 3/4, you get 12
multiplying 4/4 to 5/3, you get 20/12
multiplying 6/6 to 3/2, you get 18/12
multiplying 3/3 to 3/4, you get 9/12
now you can add them easily and you get 47/20
turning that into a whole fraction, you get 2 7/20
First, we need to calculate the cost of the sale tax. To do it, we are going to convert the sale tax from percentage to fraction by dividing it by 100, and then we are going to multiply the cost of the DVD by the sale tax:

Now, we can multiply the cost of the DVD by the sale tax to find the cost of the sale tax:

Now that we know that the sale tax is $1.26, we are going to add the cost of the sale tax to the cost of the DVD and check if that sum is less or equal than Torri's money (20$):

Since $19.26
$20, we can conclude that Torri has enough money to buy the DVD. In fact, Torri will end with a change of $0.74 after buying the DVD.
For this case what you must do is to graph both lines. (See attached graph) and see where both are cut.
We note that both lines are cut at the point (2,5)
Therefore the solution for f (x) = g (x) is x = 2
answer x = 2
4469/27=169.222
Is the answer!