Hi,

Of the $\displaystyle k$ dollars a business earns each day, $\displaystyle \frac57 k$ dollars are used to pay business expenses and the rest is profit. In terms of $\displaystyle k$, how many days will it take that business to earn a profit of $\displaystyle $1400$?

A. $\displaystyle \displaystyle \frac{200}{k}$

B. $\displaystyle \displaystyle \frac{1960}{k}$

C. $\displaystyle \displaystyle \frac{4900}{k}$

D. $\displaystyle \displaystyle 200k$

E. $\displaystyle \displaystyle 4900k$

$\displaystyle \displaystyle \frac77 - \frac57 = \frac27$

$\displaystyle \displaystyle \frac27 k = 1400$

$\displaystyle \displaystyle k = 4900$

What if I divided by k: 1 = 4900/k?

Answer not available.