I feel like it is D, but I am not completely sure about that. If its wrong, I apologize.
First term = 42 + 11 x 1 = 53
Last term = 42 + 11 x 2000 = 22042
Sum of 2000 terms = (2000/2)(53 + 22042) = 1000 x 22095 = 22 095 000
Since
![\sqrt[3]{32}\not\in\mathbb Z](https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B32%7D%5Cnot%5Cin%5Cmathbb%20Z)
, you can omit B and C as possible solutions.
Now,

but since 16 is not divisible by 3, A is not correct either.
So D is the answer. To verify:
Answer:

Step-by-step explanation:
The equations given are:


For the equations to generate the same independent value, then

This implies that:

Group similar terms to get:

Simplify to get:


Answer:
10 pounds of the $1.50 chocolate were used.
30 - x represents the number of pounds of the 0.90 chocolate used.
Step-by-step explanation:
30 * 1.10 = 1.5x + 0.9 (30 - x)
33 = 1.5x + 27 - 0.9x
0.6x = 6
x = 10