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iseestars3748
04.11.2020 •
Mathematics
The coordinates of the endpoints of AB are A(3,6) and B(7,–10). Point C is on AB and divides it such that AC:BC is 1:3. What are the coordinates of C?
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Ответ:
1. Point P is on segment AB such that AP: PB is 2:5. If A has coordinates (-8, -2) and B has coordinates (6, 19), determine and state the coordinates of P.
P is 2/5 of the way from A to B.
compute the distance from the x-coordinate of B to the x coordinate of A = 6--8 = 14.
Multiply by 2/5 = 5.6. And add that to the x-coordinate of A = 5.6 + -8 = -2.4
compute the distance from the y-coordinate of B to the y coordinate of A = 19--2 = 21.
Multiply by 2/5 = 8.4. And add to the y-coordinate of A = 8.4 + -2 = 6.4.
Coordinates of P are (-4.4,6.4)
2. Point P is on segment AB such that AP: PB is 1:3. If A has coordinates (-3, -4) and B has coordinates (5, 0), determine and state the coordinates of P.
P is 1/4 of the way from A to B.
compute the distance from the x-coordinate of B to the x coordinate of A = 5--3 = 8.
Multiply by 1/4 = 2. And add that to the x-coordinate of A = 2 + -3 = -1
compute the distance from the y-coordinate of B to the y coordinate of A = 0--4 = 4.
Multiply by 1/4 = 1. And add to the y-coordinate of A = 1 + -4 = -3.
Coordinates of P are (-1,3)
3. Line v has an equation of y = –3/8 x + 5. Perpendicular to line v is line w, which passes through the point (6, 6). What is the equation of line w?
slope of line v is -3/8. slope of line w is negative reciprocal of slope of line v = 8/3
y = 8/3x + b. Plug in (6,6) for (x,y) in that equation to solve for b:
6 = 8/3(6) + b
b= -10
y = 8/3x -10
4. Line a has an equation of y = –1/3 x + 6. Line b includes the point (–1, 2) and is parallel to line a. What is the equation of line b?
slope of line a = -1/3. slope of line b parallel to line a is identical = -1/3
y = -1/3x + b. Plug in (-1,2) for (x,y) in that equation to solve for b:
2 = -1/3(-1) + b
5/3 = b
y = -1/3x + 5/3
5. The coordinates of the endpoints of AB are A(3,6) and B(7,–10). Point C is on AB and divides it such that AC:BC is 1:3. What are the coordinates of C?
Follow procedure done for 2nd problem which also has segments in ratio 1:3
Step-by-step explanation:
Ответ: