Topic: associative, commutative, and distributive properties

which property is not used to simplify the following expression?

2*(x+5)+7x=(2x+10)+7x
=(10+2x)+7x
=10 +(2x+7x)
=10 + 9x
=9x + 10

a. associative property of addition

b. commutative property of addition

c. distributive property

d. commutative property of multiplication

D

Step-by-step explanation:

cumulative property of multiplication

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