Answer:
Step-by-step explanation:
Function given
Range = -5
- f(x) = -5
- 4x - 1 = -5
- 4x = 1 - 5
- 4x = -4
- x = -1
Domain is -1
Let the speed for the first 12 mi be x mi/h, the speed for 18 mi was (x+4) mi/h
thus given that
time=distance/speed
the average time will be:
3=(12+18)/(x+x+4)
3=30/(2x+4)
solving for x we get
3(2x+4)=30
6x+6=30
6x=24
x=4 mi/hr
Answer: 12 mi/hr
Answer:
A=B=C
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(6,7) should be the answer