Use your calculator to work out 162 – 17
V2.3 + 5.87
Write down your full calculator display.

9514 1404 393

  83.6155157107

Step-by-step explanation:

See attached.

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Most calculators will require that you enclose the numerator in parentheses. You may or may not need to do that for the square root function and denominator as well.

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My calculator uses RPN, so the sequence of keys would be ...

  16 . . . x^2

  17 . . . - (minus) . . . displaying 239

  2.3 . . . enter

  5.87 . . . + . . . displaying 8.17

  √ . . . . displaying 2.85832118559

  ÷ . . . . displaying 83.6155157107

This kind of calculator gives me complete control over the way the calculation is done, so no parentheses are needed. (The number 239 simply waits for the ÷ operation.)

Some "algebraic" calculators do not conform to the Order of Operations, and some do not have enough memory for pending operations. The manual doesn't always point out the limitations.

I like the G.oogle calculator because it is guaranteed to conform to the Order of Operations. That requires you to know where to use parentheses. Its final display always uses parentheses to show exactly how it did the computation.

europa2433

europa2433

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.