Equation 1 is 2W - 6 = L
equation 2 is 140= W * L
L=10
W=8
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Step-by-step explanation:
first you do x/5=10-6 the second step you do is x/5=4 the third step is x=4x5 finally the answer is x=20
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
Should be 12.5
19.5 would come out to be greater than 20
17.5 would come out to be 20, but it must be less than
therefore, 12.5 is the answer
