Looking at these two equations, you need to cancel out the variables with powers and the z. This can be simply done by adding them.
9y-2y^2+3z^2=867
+
9x+2y^2-3z^2=132
-----------------------------
9y+9x=999
Factor the 9 out of the left side.
9(x+y)=999
x+y=111
The answer is C (111).
The answer is A because √(7² + 10² ) does not equal 16, but it is about 12. The pythagorean theorem states that in a right triangle a² + b² = c², and it doesn't fit the equation. Hope this helps!
Dear ahag1392,
Please write your question properly, so that I'll be able to answer it properly.
Thank you
With Regards
Brainly Helper
Answer:
29
Step-by-step explanation:
because 29 for the 4 = 7 for 8