(2n^2-5n-6)+(-n^2-3n+11)

The answer to your question is  n² - 8n + 5

Step-by-step explanation:

Data

               (2n² - 5n - 6) + (-n² - 3n + 11)

- Remove the parentheses, the signs of the terms of the second parentheses do not change.

               2n² - 5n - 6 - n² - 3n + 11

- Group like terms

               (2n² - n²) + (-5n - 3n) + (-6 + 11)

- Simplify

                  n² - 8n + 5

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