A man travels x km at 60 km/h and y km at 40 km/h and takes 2 hours for the
journey. If the time taken to travel 5x km at
40 km/h and 3y km at 50 km/h is 11 hours
42 minutes, find x and y.

square root

step-by-step explanation:

b i think

step-by-step explanation:

not really sure

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.