Amodel train is 8 inches long and 3 inches high. if the real train is 120 inches high, how long is the real train?

x = 320 in

x = 960 in

x = 45 in

x = 360 in

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

b. 2 and 4

step-by-step explanation:

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.

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.