Answer:
......
Step-by-step explanation:
$63.00 is the closet answer.
12.70 x 5
12.7
× 5
------------------
13
63.5
Therefore, 12.7×5=63.5.
$63.5
15+10y−4xy−66
Soustraire 66 de 15 pour obtenir −51.
−51+10y−4xy