The ratio of the longer side of a rectangle to its
shorter side is 4 to 3. if the shorter side of the
rectangle is 21 ft, what is the length of its longer side?

28 ft

Step-by-step explanation:

Given,

The ratio of the longer side of a rectangle to its shorter side=4:3

It is said that the length of the shorter side is 21 ft.

Let the longer side be x.

Then,

4:3=x:21

or,4/3=x/21

or,x=(4*21)/3=28 ft.[ANS]

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.

the answer is c hope this