book Maths Puzzle Numerical Ability

solve /x/= 7
^absolute value
and...
solve /x/= -9

and...
solve and graph /x+5/<= 2

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book Other Question

Old Isaac dropped from his perch on Mrs. Cohen's window ledge 25 feet above ground. Teh equation h=16t*2+25 gives Isaac's height above the ground in feet as a function of time, t, -3/4 multiplied by -4/5