catdog2230
12.01.2021 •
Physics
A cannonball is fired with a velocity of 559 m/s. If the cannon is aimed 28 ° above the ground, how far away does the cannonball land? Ignore air resistance and use 9.8 m/s2 for acceleration due to gravity.
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Ответ:
Step-by-step explanation:
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Quadrilateral WXYZ is on a coordinate plane.
Segment XY is on the line x - y = -3, and segment WZ is on the line x - y = 1. Which statement proves how segments XY and WZ are related?
A: They have slopes that are opposite reciprocals of 1 and -1 and are, therefore, perpendicular.
B: They have the same slope of 1 and are, therefore, parallel.
C: They have slopes that are opposite reciprocals of 0 and undefined and are, therefore, perpendicular.
D: They have the same slope of -1 and are, therefore, parallel.
x-y = -3 => y = x+3...........(1) => slope = coefficient of x = 1
x-y = 1 => y = x-1 ..............(2) => slope = coefficient of x = 1
Therefore the correct statement is
They have the same slope of 1 and are, therefore, parallel.
(see also graph, attached)