exam Maths Puzzle Numerical Ability

When you exercise, your pulse rate rises. Recommended pulse rates vary with age and physical condition. For vigorous exercise, such as jogging, the inequality: 0.7(220 �� a) <= R

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I need help finding slope of line passing through (-3,3) and (-3,-3) Please help me with this problem: A five-pointed star is inscribed in an irrergular pentagon, how do I find the formula for the sum of it's angles? I tried drawing it in the regula