The correct answer is 5.46.
3x2−21x+3=0
Step 1: Use quadratic formula with a=3, b=-21, c=3.
x=−b±√b2−4ac2a
x=−(−21)±√(−21)2−4(3)(3)2(3)
x=21±√4056
x=72+32√5 or x=72+−32√5
answer
x=72+32√5 or x=72+−32√5
As they are traveling in opposite directions you need to do 50 + 40 to find out how far apart they travel every hour. 50 + 40 = 90. So you know that they are 90 miles apart every hour.
180 / 90 = 2. so you know that it takes them 2 hours to be 180 miles apart.
Its 17.5 gallons because 2 quarts times 35 equals 70 quarts and 17.5 gallons equals 70 quarts
Step-by-step explanation:
7.2 / (-8.1) / (-3.7) = Positive
A = (-7.2) / (-8.1) / (-3.7) = Negative
B = (-7.2) / (8.1) / (3.7) = Negative
Hence the answer is C, none of the above.
