Please solve with explanation will give BRAINLIEST and Bonus Points

55

Step-by-step explanation:

let x be her dad's age then Anna is x + 7

In 19 years

dad's age is x + 19 and Anna's age  = x + 7 + 19 = x + 26

Then her dad is twice as old as her

2 ( x + 26) = x + 19 , distribute parenthesis

x + 52 = x + 19 ( multiply through by 5 to clear the fraction )

2x + 260 = 5x + 95 ( subtract 2x from both sides )

260 = 3x + 95 ( subtract 95 from both sides )

165 = 3x ( divide both sides by 3 )

55 = x

That is her dad is 55 years old and Anna is 18

  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).