Answer:
541
Step-by-step explanation:
550-120+200-89=541
to multiply-----
(2y-1)(2y+1)
2y(2y+1)-1(2y+1)
4y^2+2y-2y-1
=4y^2-1
$25.5
12.75 divided into 3 is 4.25 and then 4.25 times 6 gives you 25.5
27 ÷ 90 = 0.3 = 0.30 = 30%
Answer: 3/7