The triangle sum theorem says all 3 interior angles must equal 180 degrees.
so, 43 + 35 = 78. [ 180 - 78 = 102 degrees for the missing angles shared by the 2 triangles.
102 + 18 = 120. [180 - 120 = 60}
leaving the measure of Angle A as 60 degrees.
It might be -3 because 3•-3 is -9?
Answer: -750ft
Step-by-step explanation: -450+-300=-750
9/10(3x+12y+-6z) is the expression, simplified it's:
2.7x+10.8y-5.4z
Hope this helped!
