felicity takes an hour to travel 30 miles .on the way back she travels twice as fast. what is her average speed?

45 mph

Step-by-step explanation:

Her speed, going, is (30 miles) / (1 hour), or 30 mph.  Returning, it's 60 mph.  Her average speed is (30 + 30) miles divided by 1.5 hours, or 60/1.5 mph, or 45 mph.  This is because it takes her 1 hour to make the outgoing trip and 1/2 hour to make the resutrn trip.

you ignore the remainder, therefore the answer is y = x+2

step-by-step explanation:

you have to divide the denominator by the numerator. you can use synthetic division or long division.

[-5] .     1 .     7 .     11

x + 2 + 1/x+5