BRAINLIEST for the correct answer!

answer is A

Step-by-step explanation:

(3+5x+1) (−2x+4)

=(3+5x+1)(+−2x+4)

=(3)()+(3)(−2x)+(3)(4)+(5x)()+(5x)(−2x)+(5x)(4)+(1)()+(1)(−2x)+(1)(4)

=3−6+12+5−10+20x+−2x+4

=3 − + 3 + 18x +4

answer: huh

step-by-step explanation:

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.