I'm sorry that I'm not in calculus, but hopefully I can help.
Personally, I would choose: D.) x; in the second equation ;
because it has easier numbers to figure out, you'll get it eventually...
The answer to the question
Answer:
A and C
Step-by-step explanation:
ABD forms a right angle
which is congruent to BCD
ABC forms right angle
which is congruent yo ADB
Wait is this 7th grade or what grade?