I can try to answer this to the best of my knowledge
so if angle A is 140 degrees) then
the other two angles *together* add up to 40 degrees)
so both B and C are less than 40.
that means their sides are less than the side opposite angle A
, so less than 3. But they tell you b is 10. hope it helps
First flip the second fraction
4/7 divided by 9/6
Next multiply 4 x 9 which is 36
Then multiply 7 x 6 which is 42
Then divide the fraction 36/42
Which since it's not even it would be in decimal form it would be 0.9
X= 55 degrees ...........
32(6+4) =320 you need to find the common term and then place on ouside of the parentheses