Need to find time based on VO2max formula

[kutub]

Calculate time based on below formula:

VO2max = 45.92
Age = 7 yrs
Gender = Male (1 for male and 0 for female)
BMI = 20.59
Time = ? (in minutes)

Formula
VO2max = (.21 * age * gender) – (.84 * BMI) – (8.41 * time) + (.34 * time * time) + 108.94


45.92 = (.21 * 7 * 1) – (.84 * 20.59) – (8.41 * time) + (.34 * time * time) + 108.94

45.92 = 1.47 - 17.2956 - (8.41 * time) + (.34 * time * time) + 108.94

45.92 = 93.1144 - (8.41 * time) + (.34 * time * time)

(.34 * time * time) - (8.41 * time) = 45.92 -93.1144

(.34 * time * time) - (8.41 * time) = - 47.1944

(.34 * time * time) - (8.41 * time) + 47.1944 = 0

Now I am stuck here.



Thanks for your help.

 

[Steven G]

Calculate time based on below formula:


VO2max = (.21 * age * gender) – (.84 * BMI) – (8.41 * time) + (.34 * time * time) + 108.94


45.92 = (.21 * 7 * 1) – (.84 * 20.59) – (8.41 * time) + (.34 * time * time) + 108.94




VO2max = 45.92
Age = 7 yrs
Gender = Male (1 for male and 0 for female)
BMI = 20.59
Time = ? (in minutes)


Thanks for your help.

Why did you stop? Multiply the values in each set of parenthesis and combine like terms. What type of equation will you have?
Do what is suggested and someone will help you further.