Let us try to formulate the expressions one by one.
let the number be x.
Step 1:
six time the number is 6*x = 6x
Step 2:
product of the number and -3 is -3x
Step 3:
now let us make equation for it:

adding 3x on the left side,


dividing right side by 9
x=45/9 = 5
So the number is x=5
First isolate the group with h in it
minus 2pir^2 from both sides
s-2pir^2=2pirh
divide both sides by 2pir
(s-2pir^2)/(2pir)=h
Answer:
maximum 5 CDs
Step-by-step explanation:
Let Mitchell can order a maximum of x CDs
It has been given that each CD costs $15.99, and shipping for the entire order is $9.99.
Thus, we have the total cost for x CDs

Now, Mitchell has no more than $100 to spend. It means

Subtract 9.99 to both sides

Divide both sides by 15.99

Hence, Mitchell can order maximum 5 CDs
answer is in above attachment..hope it helps