Answer:
Copy an angle is the best solution with compass and straight edge.
The sin of 100 is -0.50636564111.
19800 I think if I did it right sorry if I’m wrong. But I hope it helps
Answer:
A or 1st option
Step-by-step explanation:
The reason is the 2nd option.
if x^2 =1 , x can be 1 or -1
7x+1+10x-9=19x-18
add like terms
17x-8=19x-18
add 18 to both sides and subtract 17x from both
10=2x
divide by two
x=5