algebra 2 week #1a section 4. cliffs of moher, ireland

Algebra 2

Week #1ASection 4

Cliffs of Moher, Ireland

Week #1A Section 3Homework Answers

• Classwork: Cryptic Quiz• He is decomposing.• Buoy meets gull.• Bushed

• Homework:• 1. - 5 2. - 2• 3. - 1 4. 1• 5. 4 6. 0• 7. - 4 8. 7

Extra Credit: Collect like terms ⅜a - ⅞b + ⅛a + ⅜b ½a - ½b

Week #1A – Section 4

GOAL: To review more on how to solve a one variable equation.

CA STANDARD (leading to) 1.0: Students will be able to solve equations and inequalities involving absolute value.

• WARMUP QUESTIONS

• Evaluate for a = 3

• 1. a + 5 = ______

• 2. a – 2 = ______• a + 2

• 3. 5 + a2 = _______

• 4. 2a2 – 3a + 4 = _______






• 1. a + 5 = 8

• 2. a – 2 = ______• a + 2

• 3. 5 + a2 = _______

• 4. 2a2 – 3a + 4 = _______






• 1. a + 5 = 8

• 2. a – 2 = 1/5• a + 2

• 3. 5 + a2 = _______

• 4. 2a2 – 3a + 4 = _______






• 1. a + 5 = 8

• 2. a – 2 = 1/5• a + 2

• 3. 5 + a2 = 14

• 4. 2a2 – 3a + 4 = _______






• 1. a + 5 = 8

• 2. a – 2 = 1/5• a + 2

• 3. 5 + a2 = 14

• 4. 2a2 – 3a + 4 = 13





• Solve.

• 5. 8x – 5 = - 5x + 21

• 6. 24 + 9x = 3 + 7x





• Solve.

• 5. 8x – 5 = - 5x + 21• 13x – 5 = 21• 13x = 26• x = 2

• 6. 24 + 9x = 3 + 7x





• Solve.

• 5. 8x – 5 = - 5x + 21• 13x – 5 = 21• 13x = 26• x = 2

• 6. 24 + 9x = 3 + 7x• 24 + 2x = 3• 2x = - 21• x = - 21/2

Week #1A Section #4 Notes Equation Review, Part 2

Vocabulary

Least common denominator• the SMALLEST number all the denominators will divide into.

Week #1A Section #4 Notes Equation Review, Part 2 The Questions

1. If you are trying to find the least common denominator for two or more numbers, is it the smallest of the numbers?• No, it’s usually the largest.



2. HOW do you find the least common denominator?•



2. HOW do you find the least common denominator?• 1. Do all the other numbers divide into the largest? That’s it.

• 2. Multiply all the numbers. This is a common denominator, but• check to see if you can think of one that’s smaller.

Delicious fractions of cake.

Not so nice in equations.


3.HOW do you use the least common denominator to get rid of fractions in equations?

1. Multiply EVERY term by the LCD. 2. Cross cancel when you can.


• EXAMPLE: ¼x + 20 = x - 40 •


• EXAMPLE: ¼x + 20 = x - 40 • 4(¼x) + 4(20) = 4(x) – 4(40)•


• EXAMPLE: ¼x + 20 = x - 40 • 4(¼x) + 4(20) = 4(x) – 4(40)• x + 80 = 4x – 160•


• EXAMPLE: ¼x + 20 = x - 40 • 4(¼x) + 4(20) = 4(x) – 4(40)• x + 80 = 4x – 160• 80 = 3x – 160•


• EXAMPLE: ¼x + 20 = x - 40 • 4(¼x) + 4(20) = 4(x) – 4(40)• x + 80 = 4x – 160• 80 = 3x – 160• 240 = 3x


• EXAMPLE: ¼x + 20 = x - 40 • 4(¼x) + 4(20) = 4(x) – 4(40)• x + 80 = 4x – 160• 80 = 3x – 160• 240 = 3x• x = 80•


• EXAMPLE: x + 6 + 1 = x – 2• 2 3


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6•


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6• 6(x + 6) + 6(1) = 6(x) – 6(2) • 2 3•


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6• 6(x + 6) + 6(1) = 6(x) – 6(2) • 2 3• 3(x + 6) + 6 = 6x – 2(2)


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6• 6(x + 6) + 6(1) = 6(x) – 6(2) • 2 3• 3(x + 6) + 6 = 6x – 2(2)• 3x + 18 + 6 = 6x – 4•


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6• 6(x + 6) + 6(1) = 6(x) – 6(2) • 2 3• 3(x + 6) + 6 = 6x – 2(2)• 3x + 18 + 6 = 6x – 4• 3x + 24 = 6x – 4•


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6• 6(x + 6) + 6(1) = 6(x) – 6(2) • 2 3• 3(x + 6) + 6 = 6x – 2(2)• 3x + 18 + 6 = 6x – 4• 3x + 24 = 6x – 4• 24 = 3x – 4


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6• 6(x + 6) + 6(1) = 6(x) – 6(2) • 2 3• 3(x + 6) + 6 = 6x – 2(2)• 3x + 18 + 6 = 6x – 4• 3x + 24 = 6x – 4• 24 = 3x – 4• 28 = 3x•


• EXAMPLE: x + 6 + 1 = x – 2• 2 3

• LCD = 6• 6(x + 6) + 6(1) = 6(x) – 6(2) • 2 3• 3(x + 6) + 6 = 6x – 2(2)• 3x + 18 + 6 = 6x – 4• 3x + 24 = 6x – 4• 24 = 3x – 4• 28 = 3x• x = 28/3


• REAL LIFE:• The United States uses the Fahrenheit temperature scale. Most other countries, for example Canada, use the Celsius scale. The formula to convert from one scale to the other is:• F = 9 C + 32• 5•If you have a friend coming to visit you here, and you want to tell them the high temperature will be 95°F, what will be the Celsius number for that temperature?

Based on water

Week #1A Section #4 Notes Equation Review, Part 2 The Questions• REAL LIFE:• The United States uses the Fahrenheit temperature scale.

Most other countries, for example Canada, use the Celsius scale. The formula to convert from one scale to the other is:

• F = 9 C + 32• 5• If you have a friend coming to visit you here, and you want to tell

them the high temperature will be 95°F, what will be the Celsius number for that temperature?

• 95 = 9C + 32• 5•





• 95 = 9C + 32• 5• 5(95) = 5(9C) + 5(32)• 5•





• 95 = 9C + 32• 5• 5(95) = 5(9C) + 5(32)• 5• 475 = 9C + 160•





• 95 = 9C + 32• 5• 5(95) = 5(9C) + 5(32)• 5• 475 = 9C + 160• 315 = 9C





• 95 = 9C + 32• 5• 5(95) = 5(9C) + 5(32)• 5• 475 = 9C + 160• 315 = 9C C = 35°

algebra 2 week #1a section 4. cliffs of moher, ireland

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