User:
• Matrices
• Algebra
• Geometry
• Graphs and functions
• Trigonometry
• Coordinate geometry
• Combinatorics
 Suma y resta Producto por escalar Producto Inversa
 Monomials Polynomials Special products Equations Quadratic equations Radical expressions Systems of equations Sequences and series Inner product Exponential equations Matrices Determinants Inverse of a matrix Logarithmic equations Systems of 3 variables equations
 2-D Shapes Areas Pythagorean Theorem Distances
 Graphs Definition of slope Positive or negative slope Determine slope of a line Equation of a line Equation of a line (from graph) Quadratic function Parallel, coincident and intersecting lines Asymptotes Limits Distances Continuity and discontinuities
 Sine Cosine Tangent Cosecant Secant Cotangent Trigonometric identities Law of cosines Law of sines
 Equations of a straight line Parallel, coincident and intersecting lines Distances Angles in space Inner product

Consumer math
Sale prices: find the original price

During a 20% OFF sale, an item is marked $52. What is the regular price? You can find the answer by writing and solving an equation:  original price – 20% of original price = sale price p – 0.20p = 52 0.80p = 52 Simplify 0.80p ÷ 0.80 = 52 ÷ 0.80 Divide both sides by 0.80 p = 65 The original price was$65.

Karyl bought a dress at a 35% discount sale for $32.50. What was the original price of the dress? You can find the answer by writing and solving an equation:  original price – 35% of original price = sale price p – 0.35p = 32.50 0.65p = 32.50 Simplify 0.65p ÷ 0.65 = 32.50 ÷ 0.65 Divide both sides by 0.80 p = 50 The original price of the dress was$50.