He cost of ordering movie tickets online is $15.50 per ticket plus a fee of $2.25 per transaction.
Part A
Which equation can be used to determine the total cost, y, for x tickets ordered in a transaction?
Part A
Write an equation, in simplest form, that represents the perimeter of Lloyd’s backyard.
Part B
What is the value of d ?
The sum of the measures of ∠QRT and ∠TRS is 180°.
What is the measure of ∠TRS?
Grade 7 • Module 7 Study Guide • Form B © Houghton Mifflin Harcourt Publishing Company
y = 2.25x + 15.50 y = 15.50x + 2.25
Part B
What is the cost in dollars for 10 tickets ordered in a single transaction?
x = 2.25y + 15.50 x = 15.50y + 2.25

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 ☺