Helen rolls a dice and flips a coin.

Calculate the probability that she gets a 4 and a tail.

1/6 odds of rolling a 6

1/2 odds of flipping tails

1/6 x 1/2 = 1/12

: 1/6, Coin: 1/2

Step-by-step explanation:

A die has 6 sides and they are 1,2,3,4,5,6 so pthe probability that Helen picks a 4 is 1/6 cause there is only one 4 in a die.

Coin: A coin just had two sides a bead and a tail, so the probability of Helen getting a tail is 1/2 cause there is only a head and tail on a coin making it impossible for Helen to get 2 heads or a tail unless she has more than one coin with her, ( the same method works for the die)

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use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

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the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.