The sum of two numbers is 12 and their difference is 4. What are the two
numbers?

The two numbers are 8 and 4

Step-by-step explanation:

This is because 8 added to 4 makes 12.

In addition 8 minus 4 makes 4.

1) Find two numbers that add to make 12.

2) Does it minus to make 4.

  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify