Theo bought 8 packs of pencils for $4 each and 3 packs of
erasers that were on sale for $2 off their regular price of $5
each. Which keys could be entered into the calculator to
determine the total amount he spent?
O C8*4+385
C8*4+3*3
C8*4+3-2*
C8*4+3* 2-

8*4+3*3

Step-by-step explanation:

It can't be the last answer because he buys three packs of erasers for three dollars each. It can't be the third answer because you have to multiply to get the price. It can't be the first answer because it's three of the numbers given put together. So it has to be 8*4+3*3

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x