Question

Domain and range of y=0.05x^2 -x + 7 please show work .. So Confused

Answer 1

we'll use completing squares method. would that be fine?

Answer 2

Domain= all the possible x values (this is what you put into the equation)
Range= all the y values (this is what you get out of the equation)

Answer 3

Yes thats fine @sirm3d

Answer 4

\[y=0.05(x^2-40x+400)+7-0.05(400)\]

Answer 5

the range would be \[y \ge -13\]

Answer 6

Thank you very much now what about the domain?

Answer 7

x can assume any value without causing any problem, so that would be the set of real numbers

Answer 8

set of all real numbers

Answer 9

Thank you so Much!!