I think this video will help you so much, it's about how to solve it from Khan Academy
https://www.khanacademy.org/math/pre-algebra/pre-algebra-exponents-radicals/pre-algebra-scientific-notation/v/scientific-notation-old
AnswerAnd Step-by-step explanation:
7-5x2+3
x= times or multiplied
Time 2 22 34 and 9 even tho its highly corrected
The Correct Answer is (E)<span> — Recall that congruent means that two polygons are the same shape and size. Since ∆</span>ABC<span> and ∆</span>ACD<span> are congruent, you know that each angle from one triangle corresponds to an angle of the other triangle. If you are having a hard time visualizing the triangles matching up, mark up the given diagram or draw your own to show the triangles side by side:</span>
Just by filling in the angles, you can see that the remaining angle in each triangle must be 60°. To find ∠BCD, simply sum ∠BCA and ∠ACD to get a total of 60° + 90° = 150°.
