if a desktop computer costs $800 and a tablet costs $400, how can someone determine how many of each they can buy with $20000?

it depends how many of each you want, you would take $800 for the price of the item or $400. then x for the amount of items you need.  then put that all over your total and divide.

so it would look like this

Step-by-step explanation:

800(x)

20,000

$2416.6

step-by-step explanation:

per hour = $ 25

total work time = 35

commission = 15%

total she has to make = $ 4,500

let she sold x dollar products

so her commission will be 15 % of x

now

total = weekly basic pay + commission

4500= (25*35) + 15 % of x

4500=875 + * x

4500-875 =   * x

3625= * x

multiplying wwith 100 on both sides gives

36250 = 15 x

now

x =  

x= $2416.6