I will mark Brainliest An example of a rational number is.

A. negative Start Root 16 End Root

B. Start Root 27 End Root

C. negative Start Root 2 End Root

D. Start Root 57 End Root

I think d. Sorry if I am wrong.

Step-by-step explanation:

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225