Which equation has the components of 0 = x2 – 9x – 20 inserted into the quadratic formula correctly?

The required equation is .

Step-by-step explanation:

If a quadratic equation is , then the quadratic formula is

The given quadratic equation is

Here, a=1, b=-9 and c=-20.

Substitute a=1, b=-9 and c=-20 in the above quadratic formula.

Therefore the required equation is .

  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).

d

step-by-step explanation: