Answer:
30 degrees
Step-by-step explanation:
∠BAC= ∠DAE (vert. opp. ∠s)
(x +10)°= (2x -10)°
x +10= 2x -10
<em>Bring</em><em> </em><em>constants</em><em> </em><em>to</em><em> </em><em>1</em><em> </em><em>side</em><em>,</em><em> </em><em>x</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>other</em><em>:</em>
2x -x= 10 +10
x= 20 <em>(</em><em>simplify</em><em>)</em>
∠BAC= (x +10)°
∠BAC= (20 +10)° <em>(</em><em>substitute</em><em> </em><em>x</em><em>=</em><em>2</em><em>0</em><em>)</em>
∠BAC= 30°
It's y=kx. But 'k' is any constant. So my 'k' can easily be 1/(your k). The key is that when 'x' or 'y' increases by some factor, the other one also increases, by some constant multiple of the same factor. If so, then they're proportional.
I dont know how to solve this but heres a suggestion: Use PEMDAS
Answer:
Step-by-step explanation:z=180
Interior angle =180
