Answer:
<1 = 47
<2 = 65
<3 =68
<4 = 68
Step-by-step explanation:
You can multiply -6 by 2m and -5n which makes -12m+30n
Answer:
A. 
B. 
Step-by-step explanation:
Suppose 10 motors have been fabricated but that, in spite of tests performed on the individual motors, 2 will not operate satisfactorily when placed into a capsule. Then
- there are 8 motors which operate satisfactorily when placed into a capsule;
- there are 2 motors which do not operate satisfactorily when placed into a capsule.
To fabricate a new capsule, 2 motors will be randomly selected (that is, each pair of motors has the same chance of being selected).
A. The probability that both motors will operate satisfactorily in the capsule is

B. The probability that one motor will operate satisfactorily and the other will not is

I'm not sure if this dividing,multiplying,subtracting or adding but for adding i got 6 as my answer.I don't know if this the correct answer but its better than having no answer right?
Step-by-step explanation:
it's easy to prove in any right triangle with a 30° angle, the side opposite to that angle is half the hypotenuse. CA (1/2)BC, CA/BC=1/2