A. 34 times 21 divided by 2 is 357. area of a triangle is base times height divided by 2.
The given pair of lines are not perpendicular.
<h3>What is a line?</h3>
The line is a curve showing the shortest distance between 2 points.
5x - 5y = -2 - - - - - (1)
Transform the equation into standard form,
5x + 2 = 5y
y = 5x /5 + 2/5
y = x + 2/5
The slope of equation 1 is
and intercept c = 2 / 5
Similarly
x + 2y = 4 - - - - - - - -(2)
Transform it into standard form
y = -x/2 + 4 /2
y = -x / 2 + 2
Slope of the equation 2
= -1 / 2 and intercept c = 2
Slope of line 1 * slope of line 2 = 1 * -1/2 = -1/2
Since the lines are not perpendicular because the pair of lines does not satisfy the property of perpendicular lines i.e

Thus, the given pair of lines are not perpendicular.
Learn more about lines here:
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Two planes that intersect are simply called a plane to plane intersection. When they intersect, the intersection point is simply called a line.
Therefore, Plane R and Plane S form a line when they intersect.
140 if I observed the image correctly.
The answer is 10 because 5 10 15 20 25 30 35 40 45 50