User:
• Matrices
• Algebra
• Geometry
• Funciones
• 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 Ecuación de una recta Equation of a line (from graph) Quadratic function Posición relativa de dos rectas Asymptotes Limits Distancias Continuity and discontinuities
 Sine Cosine Tangent Cosecant Secant Cotangent Trigonometric identities Law of cosines Law of sines
 Ecuación de una recta Posición relativa de dos rectas Distancias Angles in space Inner product

Consumer math
Sales tax

Sales tax is an additional amount of money charged on items that people buy. The total cost of an item is the regular price plus tha sales tax.

A DVD player costs $120 and the sales tax is 6%. What is the total cost of the DVD player? Step 1: Find the sales tax  6% of$120 = 0.06x120 Write 6% as a decimal = 7.2 The sales tax is $7.20 Step 2: Add the sales tax to the regular price.$7.20 +$120=$127.20

The total cost of the DVD player is $127.20. What is the total cost of a sweatshirt if the regular price is$45 and the sales tax is 7%

Step 1: Find the sales tax

 7% of $45 = 0.07x45 Write 6% as a decimal = 3.15 The sales tax is$3.15

Step 2: Add the sales tax to the regular price.

$3.15 +$45=$48.15 The total cost of the sweatshirt is$48.15.