Answer:
D
Step-by-step explanation:
Use the distributive property.
8x3 + 20x2 + 20x for 4x's distribution.
-6x2 - 15x - 15 for -3's distribution.
Add these together, and add/subtract like terms. You're left with 8x3 + 14x2 + 5x - 15.
I think 1,784 is the surface area. But not sure
The value of x will be 3
From given diagram, triangle ABC and EDC meet at a common vertex C.
So, triangle ABC and EDC both are congruent to each other.
Applying the similarity property of congruence, ratio of the congruent triangles' corresponding sides will be equal.
Therefore,


Simplifying the expression,
We get
(18-x)/x = 25/5
(18-x)/x = 5
18-x = 5x
18-x-5x = 0
18 - 6x = 0
- 6x = -18
x = 3
Hence, the value of x is 3.
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