1. Which equation below represents the quadratic formula?

*a. -b±b2-4ac2a = x

b. a2+b2=c2

c. fx=a0+n=1∞ancosnπxL+bnsinnπxL

2. Which of the following represents a set of parallel lines?

a. Option one

b. Option two

*c. Option three

3. What is the definition of an obtuse angle?

*a. an angle greater than 90°
b. an angle equal to 90°
c. an angle less than 90°

4. Which formula below represents the area of a circle?

a. A=2πr
*b. A=πr2
c. A=π2r
d. A= √π
5.
What geometric term is represented by the image below?

a. a corner
*b. a cross-section
c. the circumference
d. the perimeter

11. Using the data in the table below, calculate the mean, or average, number of points scored by Player B.

| Game 1| Game 2| Game 3| Game 4| Game 5|
Player A| 13| 12| 9| 11| 13|
Player B| 12| 11| 15| 20| 12|

*a. 14
b. 11.5
c. 13
d. 13.67

6. This instrument is commonly used by surveyors. It measures horizontal and vertical angles to determine the location of a point from other known points at either end of a fixed baseline, rather than measuring distances to the point directly. What is it called?

a. triangulator
b. binocular
c. tripod
*d. theodolite

7. What is the name of the missing shape in the flowchart below?

a. Acute
b. Obtuse
*c. Isosceles
d. Right

8. What category includes all of the items on the list below?
* Square
* Rectangle
* Rhombus
* Parallelogram
* Trapezoid
* Pentagon

a. Quadrilaterals
b. Triangles
c. Ellipses
*d. Polygons

9. Determine the area of the shaded portion in the diagram below.

A B

C D

* ABCD is a square
* ABCD touches the circle at 4 points
* The length of one side of the square ABCD is 2 cm

a. π– 4
*b. 2π – 4
c. 3π 2 – 4
d. 4π 3 – 4
e. 5π – 4

...Quadratic Equation:
Quadratic equations have many applications in the arts and sciences, business, economics, medicine and engineering. Quadratic Equation is a second-order polynomial equation in a single variable x.
A general quadratic equation is:
ax2 + bx + c = 0,
Where,
x is an unknown variable
a, b, and c are constants (Not equal to zero)
Special Forms:
* x² = n if n < 0, then x has no real value...

...Quadratic equation
In elementary algebra, a quadratic equation (from the Latin quadratus for "square") is any equation having the form
where x represents an unknown, and a, b, and c represent known numbers such that a is not equal to 0. If a = 0, then the equation is linear, not quadratic. The numbers a, b, and c are the coefficients of the equation, and may be distinguished...

...Summer 2010-3 CLASS NOTES CHAPTER 1
Section 1.1: Linear Equations
Learning Objectives:
1. Solve a linear equation
2. Solve equations that lead to linear equations
3. Solve applied problems involving linear equations
Examples:
1. [pic]
[pic]
3. A total of $51,000 is to be invested, some in bonds and some in certificates of deposit (CDs). If the amount invested in...

...Upstream: 60 = 6(b-c)
Downstream: 60 = 3(b+c)
There are now two separate equations: 60 = 6b - 6c and 60 = 3b + 3c
Solve both equations for b: b = 10 + c b = 10 - c
Now make both equations equal each other and solve for c: 10 + c = 10 - c 2c = 0 c = 0
The speed of the current was 0 mph Now, plug the numbers into one of either the original equations to find the speed of the boat in still water.
I chose the first...

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Balancing equations is a fundamental skill in Chemistry. Solving a system of linear equations is a fundamental skill in Algebra. Remarkably, these two field specialties are intrinsically and inherently linked.
2 + O2 ----> H2OA. This is not a difficult task and can easily be accomplished using some basic problem solving skills. In fact, what follows is a chemistry text's explanation of the situation:
Taken from: Chemistry...

...Why It Couldn’t Be
The short story Cold Equations by Tom Godwin takes place on a ship called EDS. The space cruiser is piloted by a man named Barton. He has an order of killing the stowaway who snuck onto the ship because the weight on the EDS is too much for the ship to handle. In the process of hunting down the stowaway, he realizes it was a young innocent girl named Marilyn. Once Barton understands what kind of person Marilyn is, he doesn’t kill her immediately because he...

..._________________ Teacher: _______________
Reviewer: Quadratic Equations
I. Multiple Choice: Choose the letter of the correct answer. Show your solution.
1. What are the values of x that satisfy the equation 3 – 27x2 = 0?
A. x = [pic]3 B. x = [pic] C. x = [pic] D. x = [pic]
2. What are the solutions of the equation 6x2 + 9x – 15 = 0?
A. 1, - 15 B. 1, [pic] C. – 1, - 5 D. 3, [pic]
3. For which...