Which of the following did you include in your description? Check all of the boxes that apply.
Let x = the smallest even integer, x + 2 = the
next even integer, and x + 4 = the largest
even integer.
Write the equation x + x + 2 + x + 4 = -78.
Simplify the equation as 3x + 6 = -78.
Solve the equation by subtracting 6 and
dividing by 3 on both sides of the equation.
Check that the sum of the integers -28,
-26, and -24 is -78.

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 ☺

answer: 1475

step-by-step explanation:

becuase you have to know what they are asking you

b

step-by-step explanation:

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if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.