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Across 2. empty set (2 Words) 3. a statement that is true for any numbers 5. the equation of a straight line in the form y − y1 = m(x − x1) where m is the slope of the line and (x1, y1) are the coordinates of a given point on the line (3 Words) 6. In Algebra "Substitution" means putting numbers where the letters are: 7. the x-coordinate of a point where a line, curve, or surface intersects the x-axis 9. A number or symbol multiplied with a variable or an unknown quantity in an algebraic term, as 4 in the term 4x, or x in the term x(a + b). 10. A System of Equations is when we have two or more equations working together. (3 Words)

Down 1. The product of a number and the reciprocal of a number is 1. (2 Words) 4. An equation that needs two steps to solve (2 Words) 8. An equation which is true for every value of the variable is called an identity equation. Examples of identity equation: 5(a - 3) = 5a - 15, (a + b)2 = a2 + 2ab + b2