Logarithm: P = -log H Looking for H Need to move - log to the other side.

Jen

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Sep 20, 2018
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P = -log H
Looking for H
Need to move - log to the other side. So is it P÷ - log or P÷log?
Because I've changed x to ÷ do I have to change from minus to a positive?

Thanks
 
P = -log H
Looking for H
Need to move - log to the other side. So is it P÷ - log or P÷log?
Because I've changed x to ÷ do I have to change from minus to a positive?

Thanks
log(H) does NOT mean

log (multiplied by) (H)

Before that can you please tell us:

what does the statement

3^(4) = 81

mean to you?
 
Jen, what grade are you in?
Knowing that will make it easier to help you.
 
P = -log H
Looking for H
Need to move - log to the other side. So is it P÷ - log or P÷log?
Because I've changed x to ÷ do I have to change from minus to a positive?

If you've learned enough about logarithms, then this hint should be enough: raise 10 to the power on each side of the equation, and then simplify and solve for H. This is because exponentiation is the inverse of a logarithm function.
 
P = -log H
Looking for H
Need to move - log to the other side. So is it P÷ - log or P÷log?
Because I've changed x to ÷ do I have to change from minus to a positive?

Thanks
If -Log H means -Log * H to get H alone you divide by what H is being multiplied by, with does have a neg sign.

P= -Log H is the same as -P = Log H. You need to know how to go from Logs to exponential form (and hence solve for H)and to go from exponential form to logarithmic form.

Log A = B is the same as 10B = A.
 
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