The line y = 2x - 3 will have no solution with the given parabora. All other lines gives a real solution except the line y = 2x - 3
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: y intercept is 2 and slope is 6 or 6/1
Step-by-step explanation:
The number in front of x is always the slope in a y=Mx+b equation and the other number is the y intercept
(a) 230400 (b)900(2)^2t (c)2297
