1 answer:
Answer:
Step-by-step explanation:
Let x represent the fuel efficiency of one of the cars. Then 45-x is the fuel efficiency of the other. The total miles driven is then ...
miles = (gallons)×(miles/gallon)
20x +30(45-x) = 1050
-10x +1350 = 1050 . . . simplify
300 = 10x . . . . . . . . . . add 10x-1050
x = 30 . . . . . . . . . . . . . divide by 10
45-x = 45-30 = 15
The car using 20 gallons got 30 miles per gallon; the car using 30 gallons got 15 miles per gallon .
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Permutations
Answer:
A
Well I think it’s the third one but this is really advanced
Answer:
11/200
Step-by-step explanation:
5.5% = 5.5/100 = 0.055
0.055 1000
———- X ———
1 1000
=55/1000
=11/200
It's M to the exponent of -3...? It means you multiply M by itself -3 times.
