The correct answer is 96.
Answer:
The correct option is a.
Step-by-step explanation:
The general form of a quadratic regression equation is
..... (1)
Using graphing calculator we get



Substitute these values in equation (1) to find the quadratic regression equation for this data set.
Therefore the correct option is a.
Answer:
It crosses the northern part of south America! The equator is an imaginary line around the middle of a planet or other celestial body. It is halfway between the North Pole and the South Pole
Step-by-step explanation:
Answer:
1) A system of two linear equations to represent this problem
x+y=20 and x-y=12
2) The numbers are x=16 and y=4
Step-by-step explanation:
Let x and y be the two numbers
Given that the sum of the two numbers is 20
That is 
and the difference is 12
That is 
1) A system of two linear equations to represent this problem


2). Noe Solve the system to find the 2 numbers:
Adding the equations (1) and (2) we get


_____________
2x=32

Therfore x=16
Now substitute x=16 in equation (1) we get


Therefore y=4
Therefore the numbers are x=16 and y=4