Hel Meee -pl ill mark brainlies or anything u want but plsss help

A farmer is tracking the number of soybeans his land is yielding each year. He finds that the function f(x) = −x2 + 20x + 100 models the crops in pounds per acre over x years. Find and interpret the average rate of change from year 10 to year 20.
The crop yield increased by 200 pounds per acre from year 10 to year 20.
The crop yield increased by 100 pounds per acre from year 10 to year 20.
The crop yield decreased by 10 pounds per acre from year 10 to year 20.
The crop yield decreased by 0.1 pounds per acre from year 10 to year 20.

C:The crop yield decreased by 10 pounds per acre from year 10 to year 20.

Step-by-step explanation:

when finding the rate of change with the formula, the rate of change calculates to -10. also I got it correct on the quiz

tickets for the harlem globetrotters

show at michigan state university in

2010 cost $16, $23, or, for vip seats, $40.

total revenue = 16x + 23y + 40z

if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, if 9 times as many $16 tickets were sold

as vip tickets,

x = 9z => x – 9z = 0, sales of all three kinds of tickets would

total $46,575.

16x + 23y + 40z = 46575, how many of each kind of ticket would

have been sold?

solve for x, y and z

x − 9z = 0

x − y − z = 55

16x + 23y + 40z = 46575

x = 1170

y = 985

z = 130

welcome!

g

step-by-step explanation: