Answer:
answer 90
Step-by-step explanation:
since the sum of the external angles
triangle is 180
internal equal to 90
Answer:
20°
Step-by-step explanation:
According to the question, pair of supplementary angles are x and 8x
since they are supplementary, their sum is equal to 180°
x+ 8x = 180°
9x= 180°
x= 180°/9
x= 20°
To find Y we must cancel X out by making it 0.
4.2(0) - 1.4y = 2.1
-1.4y = 2.1
Divide both sides by -1.4 to get the Y by itself.
Y = 2.1/-1.4
Y = -1.5
The answer is the top one.
