If she cares for 7 cats for every 5 dogs then you would divide 91 by 7 then that would give you 13. then you would multiply 13 by 5 then that would give you 65. so therefore she has 65 dogs.
91/7=13
13*5=65
Answer:
The correct option is d
Step-by-step explanation:
From the question we are told that
The concentration of HF is [HF] = 0.6 M
The concentration of NaF is
The Ka of HF is
Generally HF(Hydrogen fluoride ) is ionized as follows
Generally NaF(Sodium fluoride ) is ionized as follows
Generally the from Henderson-Hasselbalch equation the pH of the buffer is mathematically represented as
=>
=>
=>
You seem to already see that you need to multiple x with the other numbers. When you start off solving it you'd get.. x-6=x2(to the power of) + 6x . Then just move the equation over from the left to the right. and solve, I've got -6+x2(power of 2)+7x, that's it
D. from my experience.<span />