Answer:
x = -1, -10
Step-by-step explanation:

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)
Hello
this equation is slope formula y=mx+b the m is x and b is Y so if it is saying 5/3 for x you use rise over run so i would be up 5 and over three and repeat that to make a line and the -4 is representing where your line should cross over the y axis
hope this helps
plz mark me as brainliest