book Maths Puzzle Numerical Ability

If I have a triangle with one side equalling 8 feet, another side equalling 12 feet, and I have to find the third side (which is the longest), what do I do?

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book Other Question

by drawing the graph y=x2(X2 is X squared) and a straight line, solve the quadratic equation x2-x-6=0 - Determine how many solutions exist
- Use either elimination or substitution to find the solutions (if any)
- Graph the two lines, labeling the x-intercepts, y-intercepts, and points of intersection

1. (8 points) y = 2x + 3 and y = -x - 4