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## MATH 115 LECTURE 1

by: Stacy Downing

17

0

2

# MATH 115 LECTURE 1 MATH 115

Marketplace > Towson University > Mathmatics > MATH 115 > MATH 115 LECTURE 1
Stacy Downing
Towson
GPA 3.94

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This is just an introduction! More of a revieiw!
COURSE
Basic Math for The Sciences
PROF.
Ellen M. Johnson
TYPE
Class Notes
PAGES
2
WORDS
CONCEPTS
Math
KARMA
25 ?

## Popular in Mathmatics

This 2 page Class Notes was uploaded by Stacy Downing on Saturday January 30, 2016. The Class Notes belongs to MATH 115 at Towson University taught by Ellen M. Johnson in Fall 2015. Since its upload, it has received 17 views. For similar materials see Basic Math for The Sciences in Mathmatics at Towson University.

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Date Created: 01/30/16
Lecture 1: Introduction Simplify the Expressions: 1. 5(3x+4)-4 = 15x+20-4 = 15x+16 2. 4(5y-3)-(6y+3) = 20y-12-6y-3 = 24y-15 3. l -5-3 l = l-8 l = 8 Order of Operations Please Excuse My Dear Aunt Sally = Parenthesis Exponents Multiplication Division Addition Subtraction Exponents: 3 2 5 1. (x 1/3x 2/3 x 1 2. (x ) (x ) = x =x 3. (x ) = x 12 4. y / y = y 3 0 5. z =-2 2 6. ¼ = 4 = 16 7. 1/(-x) = (-x)2 8. 7x y = 7y /x 5 9. (-3x y ) = 81x y 12 Square Roots: 1. √81 = 9 2 2. √81x = 9x 3. √100/9 = 10/3 4. √500 = √5(100) = 10 √5 5. √ 48 x /√6 x = √8x 2 = 2x √2 6. 5 √x+7 x√12√ x 7√ √ 12=7 3+√ 3=9√√ 7. 8. 1/ √ 7= √/7 38=2 9. √ 2 3 2 3 10. √x =x 3 11. √−8=−2 1 3 12. √x=x 3 1/2 √64 13. (64) = = 8 Multiply 2 2 1. (x+3)(x+7) = x + 3x + 7x + 21 =x + 10x + 21 2. (x-2) = (x-2)(x-2) = x -2x- 2x+ 4 = x - 4x +4 F.O.I.L = First, Outer, Inner, Last Greatest Common Factor 1. 10x - 4x = 2x (5x-2)

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