exam Maths Puzzle Numerical Ability

Demand equation. Helen’s Health Foods usually sells
400 cans of ProPac Muscle Punch per week when the price
is $5 per can. After experimenting with prices for some
time, Helen

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exam Other Question
Can you give me a shortcut formula for this problem???
Problem:"On a plane containing a line segment, how many points are equidistant to the ends of the segment?" graph the inequality

y+x>3