i need help on this

3a-4b+2c

A=3

B=4

C=5

the picture is blurred out nevermind

Plug in:

3(3)-4(4)+2(5)

9-16+10

=3

we plug in a,b,c to get 3*3-4*4+2*5 and simplified we have 9-16+10 we solve thta 9-16=-7 and 10+-7=10-7=3 so our final answer is 3

If you plug in the values, you'll get 3(3)-4(4)+2(5) which is 3.