Fast I will give brainlist The total number of seats in a movie theater is calculated by adding the area of the upper section given by 8x? and the area of the lower section given by 6x2. The theater plans to add an addition of front row seats given by 4x for a total of 138 seats. Which
equation could be used to solve for the number of seats in the front row addition?
A
8x2 + 6x2 + 4x = 138
BY
8x2 + 6x2 - 4x = 138
8x2 - 6x2 + 4x = 138
D)
8x2 - 6x2 - 4x = 138

(888)

Step-by-step explanation:

okay u stupi if u ont kno jkjk i ont kno byee

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺