kenzierosa
31.07.2019 •
Mathematics
Equation a: 3x + y = 6 equation b: 6x - 2y = 4 equation c: y = 3x - 2 equation d: y = 1 3 x + 7 which two lines are perpendicular?
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Ответ:
A: 3x + y = 6
B: 6x - 2y = 4
C: y = 3x - 2
D: y = 1/3 x + 7
To figure out which two lines are perpendicular, we must look at the slopes of each one after putting them into standard form, y = mx + b.
Standard Form:
A: y = -3x + 6
B: y = 3x - 2
C: y = 3x - 2
D: y = (1/3)x + 7
Lines are perpendicular when their slopes are opposite inverses of eachother.
The opposite of -3 is 3 and the inverse of 3 is 1/3.
Therefore, lines A and D are perpendicular to one another :)
Ответ:
Step-by-step explanation:
Each of the small triangles are right, so we can add up all the small triangle's areas to find the total area.
The 4-by-10 triangle: The area is .
The other 4-by-10 triangle has the same side lengths and hence the same area, so the area is .
The 4-by-4 triangle: The area is .
The other 4-by-4 triangle has the same area, .
The total area is .