Tracy received a $21.00 gift card for phone apps. She
has used $9.00 of the value and wants to buy one
more app from the list shown to use up the balance.
Complete the bar diagram and use the equation
$21.00 = x + $9.00 to determine which app she
should buy.



Pls help

Tracy received a 2100 gift card for phone apps She has used 900 of the value and wants to buy one more app from the list shown to use up the balance Complete th class=