Answer:
because it's a 90 degree angle both angle measures have to add up to a sum of 90 so if one side is 15 you do 90-15=75 then to find x solve the equation 2x+5=75 subtract 5 from 75 2x=70 x=35
10 because 1 +1= 2 and 2 + 8 = 10
All the angles in a triangle equal 180 degrees so 128 + (5x+10) + 9x = 180
Group the like values to get 138 + 14x = 180
Subtract 138 from 180 to get 14x = 42
Divide 42 by 14 to get x = 3
Therefore x = 3
567,433 rounded to the nearest hundred thousandth is 600,000.
