exam Maths Puzzle Numerical Ability

The cost for a long-distance telephone call is $0.36 for the first minutes and $0.21 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $3.00.

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exam Other Question

they involve graphing, inequalities and systems of equations! Problem 10 is a lot like Check Yourself 3 (p 726)�.

10) 3x - y ≤ 6
x ≥ 1
y ≤ 3
How do I prove that this equation is a circle, and what is the center and the radius?
{{{ 3x^2+3y^2+12x-6y+18=0 }}}

I put the equation into standard form and got:

{{{ (x+2)^