In order to use the elimination method<span>, you have to create variables that have the same coefficient—then you </span>can eliminate<span> them. Multiply the top </span>equation<span> by 5. Next add the </span>equations<span>, and </span>solve<span> for y. Substitute y = 10 into one of the original </span>equations<span> to find x.</span>
ΔABC and ΔCBD are similar. Therefore we have the proportion:

Substitute:
<em>cross multiply</em>

Answer:
C
Step-by-step explanation:
Answer:
Find the degree of the equation to determine if linear.
"Not Linear"
Step-by-step explanation: