50 POINTS, HELP
2 answers:
Answer:
Option D. = 8n - 359
Step-by-step explanation:
The given sequence is -351, -343, -335, -327, -319......
As we can see there is a common difference of 8 in each successive term.
T₂ - T₁ = -343 - (-351 ) = 351 - 343 = 8
T₃ - T₂ = -335 - ( 343 ) = 343 - 335 = 8
Therefore, the given sequence is an arithmetic sequence.
Now the explicit formula of an arithmetic sequence is represented by
a = first term of the sequence
n = number of terms
d = common difference
= -351 + 8n - 8
= 8n - 359
Therefore, option D. = 8n - 359 is the answer.
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Answer:
A.) x-y=2 and x+2y=-2
Step-by-step explanation:
For option A, we have:
x-y=2
x+2y=-2
Subtract the first equation from the second, to get:
2y--y=-2-2
This implies that:
2y+y=-2-2
Simplify to get:
3y=-4
Divide both sides by 3 to get:
We substitute y=-1.3 into the first equation to get:
x--1.3=2
x+1.3=2
x=2-1.3
x=0.7
The solution is (0.7,-1.3), which is approximately (0.7, -1.4)
By inspection, all the other factors have solutions not close to (0.7, -1.4)