The eighth term of a linear sequence is 26. The term-to-term rule is 'add 3 Work out the fourth term of the sequence.
Explain the method you used to solve this problem.

14

Step-by-step explanation:

let a be first term.

d=3

l=a+(n-1)d

26=a+(8-1)3

26=a+7(3)

26=a+21

a=26-21

a=5

when n=4

l=5+(4-1)(3)

=5+3(3)

=5+9

=14

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

x-3y=4

step-by-step e