Answer:
$80
Step-by-step explanation:
40 increase 100% =
40 × (1 + 100%) = 40 × (1 + 1) = 80
Answer: C
Step-by-step explanation:
The answer is most likely a because if you calculate its better
$2.6, multiply 13 by .2 and you get 2.6
add 4n and 5n, which is 9. 9n=-9, and if u divide both sides by nine, n=-1