So x + y = 45, and 4x + 5y = 195. Get y by itself. Subtract x from both sides in the first equation to get y = 45 -x, and subtract 4x from the second equation to get 5y = 195 - 4x. Divide by 5 to both sides to get y = 39 - 4/5x. 39 - 4/5x = 45 - x. Add x to both sides to get 39 - 1/5x = 45. Subtract 39 from both sides to get -1/5x = 6. Divide by -1/5 to get x = -30, or 30. In the first equation, do 30 + y = 45. Subtract 30 from both sides to get y = 15. Check. 4(30) + 15(5) = 195, or 120 + 75 = 195.
B+c is 16
16 + 25 Is 41
I don't know d sorry
11-2×48= 412. So the value of the expression is 412.
You know that it is an equliateral triange, so the interior angles are each 60 degrees. So the answer cannot be lower then 60. Finally.......
60 + 120 = 180.
So the answer is d. 120 degrees
Where is the question to this or is this the answer
