Answer:
x>-2
Step-by-step explanation:
Answer:
y = x
Step-by-step explanation:
The inverse of f(x) = x is just y = x.
Answer:33.6
Step-by-step explanation:
<span>yes; the number is written in scientific notation</span>
Answer:
65 mph on level road
Step-by-step explanation:
Set b as average speed on the level road and (b-20) = average speed on the winding road
Distance = speed * time
Level Road distance + winding road dististance = 285 miles
Substituting b and (b-20), we have,
3b + 2(b-20) = 285
3b + 2b - 40 = 285
5b = 285 + 40
5b = 325
b= 325/5
b = 65 mph on level road
