31 At what point does the line given by the following equation cross the y-axis?
y = + 3
O A. (0,-)
OB. (0,3)
OC (-4.0)
D. (3, 0)
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step-by-step explanation:

try remembering the steps

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.

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.