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

then

You put them in fractions then cross multiple.
18/12 and 3/x so that's 36 equals 18x then you divide 36 by 18 which is 2.
Answer:
Area = 16.8 * 7 / 2 = 58.8 ft2
Step-by-step explanation:
Have
18.2^2 = 7^2 + a^2
-> a^2 = 18.2^2 - 7^2
-> a^2 = 282.24
-> a = 16.8
Area = 16.8 * 7 / 2 = 58.8 ft2
Answer:
The answer is 250.
Step-by-step explanation:
The smallest integer that can be round off to 300 is 250.
e.g
250
≈ 300
249
≈ 200