Which of the following is the correct point - slope equation for the line that passes through the point (-6,-1) and is parallel
to the line given by y = 7x+31?
2 answers:
Answer:
The answer is C
Step-by-step explanation:
If the two lines are parallel then they have the same slopes, the equation of the first line is y=7x+31, then the slope of the line is 7. Now you have the slope of the second line and this line is passing through the point (-6 , -1) then we will use the form of the equation so the correct answer is C
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Answer:
see explanation
Step-by-step explanation:
The nth term of an AP is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Given a₅ is double a₇ , then
a₁ + 4d = 2(a₁ + 6d) , that is
a₁ + 4d = 2a₁ + 12d ( subtract a₁ from both sides )
4d = a₁ + 12d ( subtract 12d from both sides )
- 8d = a₁
The sum of n terms of an AP is
=
[ 2a₁ + (n - 1)d ] , substitute values
=
( 2(- 8d) + 16d)
= 8.5(- 16d + 16d)
= 8.5 × 0
= 0