Answer:
The third sequence.
Step-by-step explanation:
In an arithmetic sequence, the difference between two consecutive terms is the same.
For each option, find the difference between consecutive terms:
First option:
The differences are not the same. As a result, this option is not an arithmetic sequence.
Second option:
The differences are not the same. As a result, this option is not an arithmetic sequence, either.
Third option:
The differences are all
. As a result, this option is indeed an arithmetic sequence. Its common difference is
.
Fourth option:
The differences are varying between
and
. As a result, this option is not an arithmetic sequence.
I hope this helps ( there is no negatives )
Answer:
a Dryer @ 4,000 watts. Cost = 172 cents
a Heater @ 1,500 watts. Cost = 64.5 cents
a Radio @ 40 watts. Cost = 1.72 cents.
Step-by-step explanation:
Given that cost of 1 kilowatt hour = 4.3 cents.
Then cost of 1 kilowatt for 10 hours = 4.3*10 = 43 cents.
4000 watts = 4000/1000 kilowatt = 4 kilowatts
Then cost for running a Dryer for 10 hours = 4*43 = 172 cents.
-----------
1500 watts = 1500/1000 kilowatt = 1.5 kilowatts
Then cost for running a Heater for 10 hours = 1.5*43 = 64.5 cents.
-----------
40 watts = 40/1000 kilowatt = 0.04 kilowatts
Then cost for running a Radio for 10 hours = 0.04*43 = 1.72 cents.
You can treat ratios as fractions
x:13=48:104
x/13=48/104
simplify 48/104
48/104=24/52=12/26=6/13
x/13=6/13
multiply both sides by 13
x=6
the missing number is 6