Answer:
no solution
Step-by-step explanation:
7m-(5m-12)= 8+2m+4
2m+12= 2m+4
no solution
Answer:
The answer is C
Step-by-step explanation:
Hope this helps.
Answer:
D
Step-by-step explanation:
Using the Cosine rule to find AC
AC² = BC² + AB² - (2 × BC × AB × cosB )
= 18² + 12² - ( 2 × 18 × 12 × cos75° )
= 324 + 144 - 432cos75°
= 468 - 111.8
= 356.2 ( take the square root of both sides )
AC =
≈ 18.9
-----------------------------------------
Using the Sine rule to find ∠ A
=
( cross- multiply )
18.9 sinA = 18 sin75° ( divide both sides by 18.9 )
sinA =
, then
∠ A =
(
) ≈ 66.9°
-15+15 - 9y =39+15
-9y=54
y= -6
Because both of the polygons are congruent and are flipped so there for they are the same angle