F(1) is the first term of the arithmetic sequence, then f(1)=-9
Common difference: 7
-2-(-9)=-2+9=7
5-(-2)=5+2=7
12-5=7
Answer: Fourth option
f(1)=-9
Common difference: 7
Answer:
46
Step-by-step explanation:
89
Answer:
D 5
Step-by-step explanation:
the same scaling factor s applies to all sides when transforming from the small to the large triangle.
x×s = x + 5
(x-2)×s = x +1
=> s = (x+5)/x
=> (x-2)×(x+5)/x = x + 1
=> x² + 3x - 10 = x² + x
=> 3x - 10 = x
=> 2x = 10
=> x = 5
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