An online music club sells compact discs for $9 each plus $1.50 shipping and handling per order. Maria’s total bill was $82.50. Using the following equation, how many compact discs did Maria purchase

9

Step-by-step explanation:

The equation is

9x + 1.50 = 82.50

You must isolate the 9x , to do so you have to subtract 1.50 from both sides.

9x + 1.50 = 82.50

      -1.50    -1.50

9x = 81

isolate the variable (x), to do so you have to divide both sides by 9

9x = 81

/9     /9

=

x = 9

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice