1 1/2 cause your getting half not just sum
a.
20/2 = 10
0, 10, 20, 30, 40, 50
b.
32.4/4 = 8.1
0, 8.1, 16.2, 24.3, 32.4, 40.5
c.
8.8/4 = 2.2
0, 2.2, 4.4, 6.6, 8.8, 11
d.
10/3 = 3.3
0, 3.3, 6.7, 10, 13.3, 16.7
We are given that popularity of television is inversely proportional to its cost.
let us say popularity of television is represented by "P" and cost of television by "T".
We will use a constant "k" to convert the proportionality sign to equal to (=) sign.
Thus forming the equation :

We are given that 15 customers buy a television that cost $1500.
plugging P=15 and T=1500, finding k,

k=15*1500 = 22500
Next we have to find how many customers would buy a television that costs $2500, so here k=22500 and T=2500, plugging this in the equation we have ,

P=9
So there will be 9 customers that buy a television which costs $2500.
I believe you meant to have...
4x + 17 = 5x + 6...
Move the 4x to the right by subtracting it from both sides which in result you get...
17 = x + 6
Then you want to subtract 6 from the right to the left so you get...
11 = x
OR
If you meant 4 * 17 = 5x + 6 then what you do is multiply the left side which in turn gets...
68 = 5x + 6
Subtract six from the right to the left and you get...
63 = 5x
Divide by 5 then you get..
x = 63/5 or you can also say x = 12.6