Question

1. Gina has $90 in her account and takes out $2 each day. Using aas the amount left in the account and d as the number of dayspassed, write an equation for Gina's bank account.

Answer 1

Now Gina originally has $90 in her account. She takes $2 everyday

So since we are told to take d as the number of days, this means in any number of days, the amount she takes becomes

`\begin{gathered} 2dollars* d \\ =2* d \\ =2d \end{gathered}`

The amount left in her account should be gotten by subtracting 2d from the original amount of $90, so that becomes

`90-2d`

Since we were told that a should represent the amount left, it implies that

`a=90-2d`

Hence the equation for Gina's bank account is

`a=90-2d`