Answer:
Step-by-step explanation:
The rate of change (slope) is 1 which is more than function 2 and less than function 1
Is (-5, 0.5) a solution of this system? - 4y = -7 0,2x + 2 = 0
1 answer:
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Answer:
f(6)= 7 f(11)= 22
f(7)= 10
Step-by-step equation:
Normal-travel DATA:
distance = 240 km
rate = x km/h
time = d/r
= 240/x hrs
_______________________
Bad weather DATA:
distance = 240 km
rate = (x-20) km/h
time = 240/(x-20) hrs
______________________
Bad time - normal time = 2 hrs
240/(x-20) - 240/x = 2
120/(x-20) - 120/x = 1
120x -120(x-20) = x(x-20)
20 = x^2 -20x
x^2 - 20x - 20 = 0
x = [20 +- sqrt(20^2 - 4*1*-20)]/2
x = [20 +- sqrt(480)]/2
x = [20 +- 4sqrt(30)]/2
x = 10 +- 2sqrt(30)