4b - a if a=2 b=4 find its answer

14

Step-by-step explanation:

if b=4 and a=2, then you substitute both those values into the equation, turning (4b - a) into (4*4 - 2), then you use order of operations, meaning you multiply the 4 times the 4, which turns it into 16-2, and then subtract 2 to finally reach your answer of 14.

the circle one

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.