Answer:
C
Step-by-step explanation:
Answer: only has one solution
Step-by-step explanation: If you find the answer for 7x+3x-8, youll get 10x+8. This will be the same answer for 2(5x-4). Making them equal and having only one solution
Surface area is the area of all the surfaces we can touch
2a)
1/2*5*3+1/2*4*3+6*4+6*5 which is
67.5
b) 2*(1/2*10*6)+12*6+12*10 which is
252
The given sequence is x-1, -2x+2, 4x-4, -8x+8 .
Notice that this is a geometric sequence because here we have equal common ratio.
So, common ratio : r = 
= 
=
Take out -2 as common factor
= -2 Cancel out x - 1.
The formula for general term of a geometric sequence is,

Where, first term: 
We need to find the 10th term of this sequence. So, n = 10.
Next step is to plug in these values in the above formula to get the 10th term. Hence,

So, A is the correct choice.