exam Maths Puzzle Numerical Ability

the number of straight lines (n) that can connect points (p) is given by the equation n= p(p-1)
-------- How many points has a figure if only 15 lines can be

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exam Other Question

celsius temperature readings can be converted to fahrenheit reading using the formula F = 9/5C + 32. What is the fahrenheit temperature that corresponds to each of the following celsius temperatures: -10, 0, 15, 100? Write the equation in either slope-intercept form or standard form:

The line through the points (0,12) and (5,8)