Answer:
Part 1) 
Part 2) 
Part 3) 
Step-by-step explanation:
step 1
Find the measure of side c
Applying the law of cosines

we have

substitute





step 2
Find the measure of angle A
Applying the law of sines

substitute the given values

solve for sin(A)



step 3
Find the measure of angle B
we know that
The sum of the interior angles in any triangle must be equal to 180 degrees
so

substitute the given values



Answer:
B. x ≤ 2.
Step-by-step explanation:
56 - 10x ≥ 20 + 8x
-18x ≥ -36
x ≤ -36/-18 = 2. ( Note that the inequality sign flips because we are dividing by a negative value).
Answer: 147
Step-by-step explanation:
First, 9 x 4 = 36
Again, 9 x 4 = 36
Finally 15 x 5 = 75
So, 36 + 36 + 75 = 147
The brain helped him think that
Line up the decimal point to each number in order from left to right and subtract to get the difference which should be -0.248