= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2
= 28x + 8y + 2 → b
answered: Guest
yes
step-by-step explanation:
answered: Guest
according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.