Lins father is paying for a 20$ meal. he has a 15% off for the meal. after the discount,a 7% sales tax is applied. what does lin’s father pay for the meal ?

Answer : The Lin’s father pay for the meal is, $ 18.19

Step-by-step explanation :

Given :

Cost of a meal = $ 20

He has a 15% off for the meal

. That means, discount always minus from the cost.

Cost of meal after applying coupon =

                                                            = $ 17

After the discount, a 7 % sales tax is applied.  That means, tax always add in the cost.

Cost of meal after applying tax =

                                                    = $ 18.19

Thus, the Lin’s father pay for the meal is, $ 18.19

The total cost for television company number 1 expressed as a function of x is

c1(x)=11.5x+120

That is the charge per month the number of hours plus the fixed charge for a one-time installation

Using the same pattern, write the function for the second television company. Then set the two functions equal to each other and solve for x.