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27) 3 (-5) (-7)

When there is no math symbol between numbers it is multiplication.

Multiply from left to right:

3 * -5 = -15

-15 * -7 = 105

28) -2 * 2 (-3) *2 =

-2 *2 = -4

-4 * -3 = 12

12*2 = 24

31) A negative divided by a negative is positive:

-128 / -4 = 32

32 -36 / 2 / 24 /4

Divide the top and bottom first then divide those:

-36 / 2 = -18

24 / 4 = 6

-18 / 6 = -3

The sample space of events that represent the picking out of letters at two draw without replacing is:

     {T-I, T-M, T-E, I-T, I-M, I-E, E-T, E-M, E-I, M-I, M-T, M-E}

Step-by-step explanation:

Since, there are four choice of drawing a first tile:

             T     I     M     E

and now:

If first tile is drawn as T then the outcome corresponding to T on second draw are:

                        T-I    T-M     T-E

(T-T is not possible since there is no replacement of first tile )

Similarly if I is drawn on first draw then the outcome corresponding to I in second draw is:

                      I-T     I-M     I-E

(I-I is not possible since there is no replacement of first tile )

If M is drawn on first draw then the outcome corresponding to M in second draw is:

                     M-T     M-I    M-E

(M-M is not possible since there is no replacement of first tile )

Now if E is drawn on first draw then the outcome corresponding to E in second draw is:

                         E-T     E-I      E-M    

(E-E is not possible since there is no replacement of first tile )

Hence, total outcomes are:

      {T-I, T-M, T-E, I-T, I-M, I-E, E-T, E-M, E-I, M-I, M-T, M-E}