Term 2 Week 4 Warm Ups

Warm Up 11/3/14

1. 54% of students agree with a proposal and 46% of them disagree. The margin of error is + 5%. Does the survey clearly project the outcome of the voting? Also, how many students were surveyed?

2. For each polynomial, determine which of the five methods of factoring you should use (GCF, trinomial, A≠1 trinomial, grouping, cubic, perfect squares) and factor:a. - 48x3 + 21xb. 2x3 + x2 + 8x + 4

Warm Up 11/4/14

3. A bakery wants to know whether glaze or powdered sugar is a more enticing pastry topping. They make some pastries with each topping and see which sells better. Is this an experiment or an observational study? Explain.

4. Identify all the real roots of the equation:4x5 – 8x4 – 32x3 = 0

Warm Up 11/5/145. A fertilizer company claims that its fertilizer

causes tomato plants to grow to an average of 6 feet. Cherie tests this claim by growing 50 tomato plants with the fertilizer. She finds they have an average height of 5.8 feet and a standard deviation of 0.8 feet. Should Cherie believe the company’s claim? (Hint: z-test)

6. Factor – 2x3 – 12x2 + 30x + 200 = 0

Warm Up 11/6/14

7. Factor 49x2 – 121

8. List all the possible rational roots of6x4 – 21x3 + 18x2 + 19x – 8p:q:

Warm Up 11/7/14

9. 2x6 - 22x5 + 48x4 + 72x3 = 0Identify the roots of each equation. State

whether the multiplicity at the root is odd or even.

10. 3x3 – 18x2 – 9x + 132 = 0Solve each polynomial equation by factoring.