A department store is having a sale. The advertising for the sale is shown below: "30% off if the marked prices total more than $100. If you buy three items, you get the least expensive free." a. What are at least two pieces of info needed to solve a problem about buying items and saving the most money? b. What makes this advertisement confusing to a buyer? c. Suppose you buy 3 items at marked prices of $40, $40, and $30. Which sale (30% off more than $100 OR free item) would you save the most money with?

the answer is a) y= 2 csc [0.5 (x+pi/2)]-1

step-by-step explanation:

is there more to this question?

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.