Answer:
b
brainliest pls
Step-by-step explanation:
A. 400, 500, 600, M x 100
price difference= $45-$36
=$9
now,
x% of $45=$9
or, x/100 ×45 =9
or, x/20 ×9=9
or, x/20=1
therefore, x= 20%
3(2+15)= 3(2) + 3(15)