А Which of these represents the expansion of (2a - b)º?
(2a)* + 4(2a)3 (+b) + 6(2a)?(b)2 + 4 (2a) (-6)* + (-6)*
(2a)" + 5(20)4 (+b) + 10(2a)3 (b)2 + 10(2a)?(+b)3 + 5 (2a) (-1)^ + (-6)”
(2a)4 + 4(2a)3b + 6(2a)²62 + 4 (2a) 63 +64
(2a) + 5(2a)*6 + 10(2a)® 62 + 10(2a)263 + 5 (2a) 64 +65
B
С

answer: 270

step-by-step explanation:

you have to times 200 by 1.35 to get your answer

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.