Worksheet 1 Write the equations. If the equation shows associative property put = sign. If it does not show associative property write ≠ sign

Example: 1

(2 + 3) + 9 ≠ 2 (3 + 2)

Example 2:

1 + (4 + 5) = (1 + 4) + 5

Do A - J

Also do # 1 - 4

Associative Property of Addition - Definition & Worksheets

Simplify the Expression using associative property

Example: 6 + (5 + x) = (6 + 5) + x = 11 + x

1. (6 + n) + 9

2. (10 + a) + 8

3. (7+ c) + 4

4. 10 + ( a + 9)

quit

step-by-step explanation:

can you make your screen more see able?

then i might be able to .

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 ☺