Answer:
He needs 1 more fish tank.
Step-by-step explanation:
18 / 3 = X (X equals the number of fish tanks he needs)
2 + 3 = 5 fish tanks
5 x 3 = 15 fish
18 -15 = 3
Since 5 fish tanks can hold 15 fish he will need 6 fish tanks to hold his 18 fish. He will need 1 more fish tank.
Given:
Cost of dishwasher : 315 before sales tax
sales tax : 9.22%
Total cost = 315 * 1.0922 = 344.043
Average of 10 uses per week for the next 6 years before replacing it.
There are 52 weeks in a year.
10 uses per week * 52 weeks per year * 6 years = 3120 average uses
cost for water = 0.09 ; cost for electricity = 0.13 ; total cost per use = 0.22
0.22 * 3120 = 686.40 cost of use
purchase cost = 344.043
cost of use = <u>686.40</u>
lifetime cost 1,030.443
x=0
because you must
determine the undefined range
write all numerators above the common denomonator
multiply the parenthesis
collect the alike terms
remove parenthesis
eliminate the opposites collect the like terms
set the numerator equal to 0
divide both sides by 6
check if thesolution is the defined range
if so then you would find your answer X=0
