Omar noticed that he does not have a common factor.
Which accurately describes what Omar should do next?
Omar grouped the terms and factored the GCF out of the
groups of the polynomial 3x - 15x² - 4x + 20. His work is
shown.
Step 1: (37° - 15x?) + (-4x+20)
Step 2: 3x°[x - 5) + 4(-x + 5)
O
Omar should realize that his work shows that the
polynomial is prime.
Omar should go back and regroup the terms in Step 1
as (3x°- 15x) - (4x + 20).
In Step 2, Omar should factor only out of the first
expression.
Omar should factor out a negative from one of the
groups so the binomials will be the same.
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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 ☺

pla·gia·rism

/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

step-by-step explanation: