A computer accessory comes in red (R), gray (G), or black (B) and has an optical mouse (O), mechanical mouse (M), or trackball (T). What are all the different combinations available for the accessory?
A) {R, G, B}
B) {RO, GM, BT}
C) {R, G, B, O, M, T}
D) {RO, RM, RT, GO, GM, GT, BO, BM, BT}

D) {RO, RM, RT, GO, GM, GT, BO, BM, BT}

Step-by-step explanation:

Three colors

Three types

3x3=9

So there are 9 combinations

answer: 0

step-by-step explanation: the positive, like 5, + its opposite, like -5 would be 0

5+(-5)=0, or 5-5=0

b

step-by-step explanation:

multiply terms on numerator/ denominator by (x - 1)

= ← distribute numerator/ denominator

= ← simplify

=

= → b