Drag and drop each pair of points into the correct category to show whether each set of points is on a line that has a positive slope, negative slope, zero slope, or undefined slope.
(1, 2) and (-4, 10)
(3, 1) and (6,5)
(-5, 2) and (-5, 10)
(2, 6) and (11, -3)
(-3, 7) and (7,7)
Line Through Points
Has Positive Slope
Line Through Points
Has Negative Slope
Line Through Points
Has Zero Slope
Line Through Points
Has Undefined Slope

answer: 12

step-by-step explanation:

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.