book Maths Puzzle Numerical Ability

Using the digits 1 to 9 once. How could you get the sum of 777

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Please I desperate need your help on the following graphing of each inequality. I really apprecate your help.

1) Y < 1/2 x +2

2) x - 3y < 9

3) Y GREATER THAN WITH LINE UNDERNEATH x - 6

4) x GREATER THAN WITH LINE UNDERNEATH -6 The cost for a long-distance telephone call is $0.36 for the
first minute and $0.21 for each additional minute or portion thereof. Write an
inequality representing the number of minutes a person could talk without
exceeding $3.