True or false?
(40s + 100t) ÷ 10 =400s + 1000t

False

Step-by-step explanation:

(40s + 100t) ÷ 10 is

  (40s + 100t)/10

            (40s)/10 + (100t)/10

                 4s + 10t

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

i believe the answer is d.

hope it you! : d