Since the big triangle is an isosceles one, we conclude that the angles of the left triangle are: 32, 90 and 3x-10. Sinche the sum of this angles have to be 180° we have:

Solving for x, we have:

Therefore, x=22.67 and the answer is A.
Answer:
-23/4
Step-by-step explanation:




2 * (2a + b) + 8 = 4a + 2b + 8
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A. =
B. =
C. ≠ 4* (a + b + 2) = 4a + 4b + 8
D. =
The answer is C. C is not a proportion.
Hope this helps!
A. 15-35=-20
b. -2+7=5
c. -10+14=4
d. 60-100=-40