If I’m not mistaken, u should multiply them both , (4-x^2)(2-x)
SOLUTION: the sum of two numbers is 25 and their difference is 15. what are the two numbers? let x =one number and y= the other number. the corresponding modeling system is {x+y=25 x-y=
Answer: we need to survey 2285 Americans.
Step-by-step explanation:
When population proportion (p) is known, then the formula to evaluate the sample size( minimum) is given by :-
, where E = margin of error , z* = critical z-value.
Given: p= 0.61, E=0.02, Critical z value for 95% = 1.96
Required sample size: 

Hence, we need to survey 2285 Americans.
Answer:
I have no idea
Step-by-step explanation:
I have no clue. How did you get 40