Please help me solve this

B

Step-by-step explanation:

A rational number can be expressed in the form

← where a and b are integers

From the set

3 is rational as it can be expressed as

and = 3 ← rational

, and ← are irrational numbers

Thus there are 2 rational numbers out of the 5 given, thus

P( rational ) = → B

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1