Let \(a\) be the cost of an adult ticket and \(c\) be the cost of a child’s ticket. There are two adults and two children in the Smith family, so the total cost can be described by the equation: ...

\(y = x + 3\) is a linear equation and \(y = x^2 + 3x\) is a quadratic equation. If the product of two numbers is zero, then one or both numbers must also be equal to zero. To solve, put each ...

A MECHANICAL calculating machine for solving simultaneous ... the linear simultaneous equations to be solved. Such machines promise to be of great value in the very large number of problems ...