Help me out on this one also please

A and D

Step-by-step explanation:

A is correct as x must be any real number to yield a proper f(x) value.

B is incorrect, as a value of x=0 would mean f(x) = 0 which is outside the listed range.

C is incorrect as the equation is a quadratic (highest exponent is ^2) which forms a parabola shape on a graph and therefore does not infinitely decrease.

D is correct. To find a maximum or turning point, we can take the derivative of the function and set it to 0, as the slope at any turning point will always be 0:

f'(x) = -8x

0 = -8x

x = 0

So, the maximum occurs where x=0

f(x) = -4x^2

f(x) = -4(0)^2

f(x) = 0

This means the y-value is also 0, meaning that (0,0) is our maximum.

E is incorrect. Since the maximum is only just on the x-axis (0,0) it only touches the x-axis once so it only has one x-intercept.

Hope this helped!

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation: