Patti says that if you add the same negative integer five times, the sign of the sum is negative and its size is five times the size of the original integer. For example: –7 + (–7) + (–7) + (–7) + (–7)
= –(5 × 7) [7 is the size of –7]
= –35
Is Patti’s statement true for all negative integers? (Use a visual or logic to explain.)

Her statement is true because multiplication is repeating addition

When using negative numbers in addition, you flip it and subtract positive numbers so when doing 5 times -7, you would do, 7-7-7-7-7=-35. Hope that makes sense :)

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.