gggg79
09.01.2020 •
Mathematics
Consider the following.
point
(-5, 4)
line
x + y = 7
(a) write the slope-intercept form of the equation of the line through the given point and parallel to the given line.
(b) write the slope-intercept form of the equation of the line through the given point and perpendicular to the given line.
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Ответ:
A. a parallel line will have the same slope
y = mx + b
slope(m) = -1
(-5,4)...x = -5 and y = 4
sub and find b, the y int
4 = -1(-5) + b
4 = 5 + b
4 - 5 = b
-1 = b
so ur parallel line is : y = -x - 1 <==
B. perpendicular lines have negative reciprocal slopes. That means our perpendicular line will have a slope of 1
y = mx + b
slope(m) = 1
(-5,4)...x = -5 and y = 4
now we sub and find b, the y int
4 = 1(-5) + b
4 = -5 + b
4 + 5 = b
9 = b
so ur perpendicular line is : y = x + 9 <==
Ответ:
12
step-by-step explanation:
12 + 5 = 17
12x2=24
24-7=17