exam Maths Puzzle Numerical Ability

3 1/2x + 2 1/4 = -1/8 I need to solve for x

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exam Other Question

Could someone show me these on a graph. graphing inequalities.
1) 4x+y>-8
2) x+4y less than or equal to 4
3) 9x+y<7 A worker charges $30 for a 2 hour job. He charges $94 for a 4 hour job. How much would he charge for an 8 hour job?