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  1. 6x-5

    Step-by-step explanation:

    Alright let's begin.

    6 times a number means 6 times x. So 6x.

    Then when it says decreased by 5 it means you subtract 5!

    Your expression would look like this:

    6x-5

    Hope it helps! Mark brainliest if possible

  2. 2•156

    Step-by-step explanation: 6•52 is 312 so divide that by a number you know can be divided like 2 and get your other factor 156 so one answer can be 2•156

  3. 3√(22) + 7

    Step-by-step explanation:

    The way this is worded can be interpreted two different ways so just to cover the bases, I'll do both. I'm confident they are asking for way 1 though because it wants you to simplify the expression, not evaluate. Way 2 gives you a solution rather than an exact equation.  

    Number 1

    √(6) x √(33) + 7

    = √(6 x 33) + 7

    = √(198) + 7

    = √(9 x 22) + 7

    = 3√(22) + 7

    Number 2

    √(6) x √(33 + 7)

    = √(6) x √(40)

    = √(6) x (4√(10))

    = 4√(60)

    = 8√(15)

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