exam Maths Puzzle Numerical Ability

Please help.I do not get this problem:
Graph f:x-> |x|+2 with domain D= { -2,-1,0,1,2}

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exam Other Question

solve using quadratic equation

4x²+7x-15=0
I need the steps and this problem solved

thanks :)

An airplane flies at a rate of 200mi/h. If the airplane has flown for 4 h, how many miles has it traveled?