Bellwork

Unit 1 Quiz Sept 2015 Simplify each expression #1-5. Write the problem and answer. 1: -½ ( ¼ x + 10) 2: 8y – 2x + y + 5y 3: 9ab + 3a 2 + 5ab + 4a 2 4: (2x 2 y + 4xy – 7) – (3x 2 y – 7xy + 10) 5. 6: (Do not have to copy problem.) If a rectangle has length x 2 +4, and the width is shorter by 3, what is the perimeter?

Bellwork Solutions

Definition: Linear Equation Let a and b be real numbers such that a ≠ 0. A linear equation in one variable is an equation that can be written in the form ax + b = 0

Linear Equations in One Variable An equation is a statement that indicates that two quantities are equal. It must have an equal sign separating two parts. A solution to an equation is a value of the variable that makes the equation a true statement. Substituting a solution to an equation for the variable makes the right-hand side equal to the left-hand side.

Linear Equations in One Variable EquationSolutionCheck x = -4-4(-4) = -4 p + 3 = 118(8) + 3 = 11 -2b = (10) = -20

Addition & Subtraction Properties of Equality Let a, b, and c represent real numbers. Addition property of equality: If a = b, then a + c = b + c. Subtraction property of equality: If a = b, then a - c = b - c.

Multiplication & Division Properties of Equality Let a, b, and c represent real numbers. Multiplication property of equality: If a = b, then a c = b c. Division property of equality: If a = b, then a/c = b/c (provided c ≠ 0).

Procedure for Solving a Linear Equation in One Variable Step 1: Simplify both sides of the equation. a)Clear parentheses. b)Consider clearing fractions or decimals (if any are present) by multiplying both sides of the equation by a common denominator of all terms. c)Combine like terms.

Procedure for Solving a Linear Equation in One Variable Step 2: Use the addition or subtraction property of equality to collect the variable terms on one side of the equation. Step 3: Use the addition or subtraction property of equality to collect the constant terms on one side of the equation.

Procedure for Solving a Linear Equation in One Variable Step 4: Use the multiplication or division property of equality to make the coefficient of the variable term equal to 1. Step 5: Check your answer!

HW – Lesson step equations. Solve for the variable. Show work! x = /5 p = 4/ = w/ x = /5 y = -3/5 6.5 = t/16 7.-a = -2

Mon HW Problems Solutions 1step equations 1. x=28 2. p= -4/ =w 4. x= y= ½ 6. 80=t 7. a=2

Wedn Homework Intermediate Algebra textbook pp #15-25 odds Complete before leaving or can be found on website: uhstitans.com/carruthers-latrease

Bellwork9/18 Show the “check” work to see if the solution is correct. 3(y – 4) = 2y – 5 y = - 7

Warm Up9/18 Solve the equation: ¼ w + 1/3 w – 1 = ½ (w – 4) Remember: the fractions in this equation can be eliminated by multiplying both sides of the equation by any common multiple of the denominators.