Rubskee
contestada

This equation shows how Rosa's bank account balance is related to the number of raffle tickets she purchases. d = -3.4r + 63.6 The variable r represents the number of raffle tickets she purchases, and the variable d represents the balance of her bank account. How many tickets does Rosa need to buy to get the account balance down to $22.80?

Respuesta :

So we know that [tex]r[/tex] is the number of raffle tickets she purchases and [tex]d[/tex] is the balance of her bank account.

We are given the equation [tex]d = -3.4r + 63.6[/tex] and we want to get the [tex]account ~balance[/tex] down to $22.80. So since [tex]d[/tex] represents the account balance just plug in $22.80 for d and solve for r. 

When you do that you should get [tex]r = 12[/tex].

So, Rosa will need to buy 12  tickets to get her account balance down to $22.80. 
ACCESS MORE
EDU ACCESS
Universidad de Mexico