3questions math! ! add using a number line. 56+(−116) drag and drop the word sum to the correct value on the number line. add 34+(−212) using the number line. select the location on the number line to plot the sum. what is the sum? 1.3+(−2.4) enter your answer, as a decimal, in the box.

Steps of adding 56+(−116) using number line are as following:

1) Draw a number line by ranging from -120 to +60.

2) Point out 56 on the number line.

3) Because -116 is added to 56 on the number line,  please move 116 numbers left to 56 on the number line. We always go left in addition of a negative number on the number line.

4) The number we reach -60 on left side would be our final sum.

b) Steps of adding 34+(−212) using number line are as following:

1) Draw a number line by ranging from -212 to +40.

2) Point out 34 on the number line.

3) Because -212 is added to 34 on the number line,  please move 212 numbers left to 34 on the number line. We always go left in addition of a negative number on the number line.

4) The number we reach -178 on left side would be our final sum.

c) Steps of adding 1.3+(-2.4) using number line are as following:

1) Draw a number line by ranging from -3 to +3.

2) Point out 1.3 on the number line.

3) Because -2.4 is added to 1.3 on the number line,  please move 2.4 numbers left to 1.3 on the number line. We always go left in addition of a negative number on the number line.

4) The number we reach -1.1 on left side would be our final sum.

4

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 ☺

a

step-by-step explanation: