The discriminant of this equation is 49. The solutions for this equation are x=2 and x=-
I hope that helps.
Tons needed to unload a freight train= 21×2.5 =52.5
number of 3.5-ton payload trucks needed to unload a freight train=52.5÷3.5 = 15
15 Trucks , Each With A 3.5-Ton Payloaf , Would be Needed To Do The Same Job.
The answer is C hope it helped
28500.53 Square Inches into Square Centimeters:
183,874.019348