Answer:
um..
Step-by-step explanation:
It would be (a) because it is now
it
Simplifying this, we get:
(x+4)(x-4) = 0
Now, to get 0, we can replace x for one of these things to make 0, so:
x can either be 4, or -4
Answer:
$21
Step-by-step explanation:
$50×.60=$30
$50-$30=$20
$20×.05=$1
$20+$1=$21