Question

Find -3A+6B

Answer 1

my choices are

Answer 2

do you know how to compute -3A?

Answer 3

no, i have no idea how to do this problem.

Answer 4

-3A means you multiply everything in matrix A by -3

Answer 5

tell me what you get once you do that

Answer 6

ok hold on

Answer 7

ok

Answer 8

-6 2 -9
6 -8 0

Answer 9

all you're doing is multiplying every entry in matrix A by -3

so in row 1, column 2 for instance, we will have 5 turn into 5*(-3) = -15

Answer 10

in row 2, column 3, will have have 3 turn into 3*(-3) = -9

Answer 11

etc etc

Answer 12

this is done for every entry in matrix A

Answer 13

so the negatives are changed to positives?

Answer 14

yes and vice versa

Answer 15

so what is -3A ?

Answer 16

0 2 3
6 2 0?

Answer 17

no

Answer 18

i'm so lost

Answer 19

ok I'll draw out matrix A, one moment