Let be x the number that Ben thought of, and write the equation:
x/2 + x/4 = 60
Solve for x:
3x/4 = 60
3x = 60*4
x = 240/3
x = 80
Ben thought 80.
Answer:
one mile would it take 4 minutes and Lynn would be able to ride 1/4 of a mile in one minute
Answer:
2
Step-by-step explanation:
-3 = x^2 + 4x + 1
0 = x^2 + 4x + 1 + 3
0 = x^2 + 4x + 4
Discriminant is b^2 - 4ac.
4^2 - 4(1)(4)
16 - 4(4)
16 - 16 = 0
Discriminant Rules:
1. If b²-4ac is negative, there are no real answers.
2. If b²-4ac is zero, there is one real answer.
3. If b²-4ac is positive, there are two real answers.
Based on rule 2, the answer is ONE REAL ROOT.