Addison paid $1.29 for gum and $0.89 for a package of notebook paper . She gave the cashier a $5 bill. If the tax was $0.14, how
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You can use the FOIL method when you have two binomials.
First, outer, inner, last
As given by the question
There are given that the point of two-line
Now,
From the condition of a parallel and perpendicular line
If the slopes are equal then the lines are parallel
If the slopes are negative reciprocal then the lines are perpendicular
If the slopes are neither of the above are true then lines are neither
Then,
First, find the slope of both of line
So,
For first-line, from the formula of slope
Now,
For second-line,
The given result of the slope is negative reciprocal because
Hence, the slope of line1 is -1/2, and slope of line2 is 2 and the lines are perpendicular.