Hi can someone please help me I need help please help me thank you
2 answers:
Answer:
the lines are perpendicular
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Given
x - 2y + 8 = 0 ( subtract x + 8 from both sides )
- 2y = - x - 8 ( divide all terms by - 2 )
y = x + 4 ← in slope- intercept form
with slope m =
Given also
2x + y + 1 = 0 ( subtract 2x + 1 from both sides )
y = - 2x - 1 ← in slope- intercept form
with slope m = - 2
Parallel lines have equal slopes
The slopes are not equal thus the lines are not parallel.
For lines to be perpendicular the product of their slopes = - 1
× - 2 = -1
Thus the 2 lines are perpendicular.
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For example, given an algebraic expression in the form:
can be factored as follows:
From the given expressions, the only expression containing two perfect squares with the minus sign in the middle is the expression in option A.
i.e.
which can be factored as follows: