The easy answer: If, say, B is the zero matrix, i.e.

then

Answer:
17
Step-by-step explanation:
12 -6 divided by 3 is 2, so 15+2 is 17
Answer:
it will be the second one
Step-by-step explanation:
PLS MARK ME AS BRAINLIEST
Answer:
B. 5 cm
Step-by-step explanation:
If the width was 5 cm, the length would be 10 cm. (5 + 10) x 2 = 30 cm.
Answer:
W = 188.595
Step-by-step explanation:
We know that is means equals and of means multiply
W = 190.5% * 99
Changing to decimal form
W = 1.905 * 99
W = 188.595