The cost to rent a car is $30 per day. write an expression for the cost of renting a car d days. make a table to find how much it will cost to rent a car for 3, 5, 7, and 10 days.

    Number of days     Cost

          3                         90

          5                         150

           7                         210

          10                        300    

It is given that:

The cost to rent a car is $30 per day.

Now, the expression which is used to represent the cost for renting a car d days is:

where c is the cost of renting a car.

when d=3 we have:

     c=90

( Since, 30×3=90 )

when d=5

      c=150

( Since, 30×5=150 )

when d=7

     c=210

( Since, 30×7=210 )

when d=10

     c=300  

( Since, 30×10=300 )          

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation