Answer:
Right option is (D).
ΔABC and ΔDBE are similar triangles by side angle side similarity postulate.
Step-by-step explanation:
We have given,
Two triangles ΔABC and ΔDBE such as :

This relation will contribute to side side similarity.
Also,
∠B = ∠B , This will contribute as an angle similarity .
So combining above two relations,

and ∠B = ∠B
we can conclude that the triangle ΔABC and ΔDBE are similar triangles by side angle side similarity postulate.
Hence the right option is (C)
Consider this option/solution.
P.S. The method of solution is Gauss' method.
Answer:
n x 2 + 10
Step-by-step explanation:
All you need to do is apply this say to a number like 10 for ex: 10 x 2 + 10
= 20 + 10
= 30
Now do the same with n!
n x 2 + 10 and there is your answer!
(93.9x100) + (2.3x1,000,000)
9,390 + 2,300,000
2,309,390