Answer:
add 21 to both sides to get everything on one side
x^2 - 10x + 21 = 0
do factorization, guess and check
(x - 7) (x -3) = 0
x =7, and x =3
Answer:
The A option is correct since:

Good luck!
Intelligent Muslim,
From Uzbekistan.
Answer:
150
Step-by-step explanation:
The angle as a whole is 180 degrees. 150 and 30 are supplementary angles because they add up to equal 180.
Answer:
56.7
Step-by-step explanation:
2.7 x 21 = 56.7