Help number 9 what is the answer and the work?
2 answers:
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Answer:
b = - 2, b = 4
Step-by-step explanation:
Using the distance formula
d =
with (x₁, y₁ ) = M(3, 1) and (x₂, y₂ ) = N(- 1, b)
d =
=
=
Then
= 5 ( square both sides )
16 + (b - 1)² = 25 ( subtract 16 from both sides )
(b - 1)² = 9 ( take square root of both sides )
b - 1 = ± = ± 3 ( add 1 to both sides )
b = 1 ± 3
Then
b = 1 - 3 = - 2 or b = 1 + 3 = 4
Answer:
True
Step-by-step explanation:
The n th term rule for an arithmetic sequence is
= a + (n - 1)d
where a is the first term and d the common difference
here d = 9 - 7 = 2 and a = 7, thus
= 7 + 2(n - 1)