This is the last one but how do you find y ? what do I subtract 5 from ?

y = 250

Step 1:

To solve, we plug in 50x for y.

Then, we subtract the 10x from the right side. Our goal is to get the x by itself first.

Then, we divide both sides by 40, since we have to get the x by itself.

x = 5

Step 2:

Now that we found x, we plug in 5 to the original equation and solve from there.

y = 250

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.