Answer:
Hannah tipped was 13% of the bill.
Step-by-step explanation:
$78. 2 - $68 = $10. 2
$10. 2/$78. 2 × 100 = 13.04 = 13%
x2 - 3(x + 7) > 15x
x2 - 3x - 21 > 15x
Answer:a
12. 3:12
that is 12