Sierra used the following steps to bisect segment AB: 1. Place the compass on point A.
2. Open the compass wider than half the distance of the segment.
3. Swing an arc above and below the segment.
4. Adjust the compass width, place the compass on point B, and swing an arc above and below the segment.
5. Label the intersection of the arcs created above and below segment AB with points C and D.
6. Draw a line from point C to point D.
In which step did her error occur? Explain. (1 point)
Step 1. She did not set the proper compass length.
Step 2. She drew an arc instead of a circle.
Step 4. She changed the compass width.
Step 4. She moved the compass to a different point.

you forgot an image

step-by-step explanation:

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 ☺