Week of November 27, 2017

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Foundations of Algebra 

Solve systems of equations by graphing

A system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. The solution of such a system is the ordered pair that is a solution to both equations. To solve a system of linear equations graphically we graph both equations in the same coordinate system. The solution to the system will be in the point where the two lines intersect.

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Example

{y=2x+2y=x−1$$\{\begin{array}{c}y=2x+2\\ y=x-1\end{array}$$

Graph the equations in a coordinate plane

The two lines intersect in (-3, -4) which is the solution to this system of equations.

https://www.mathplanet.com/education/pre-algebra/graphing-and-functions/solve-systems-of-equations-by-graphing

Anatomy

Excretion

Excretion is the process of removing wastes and excess water from the body. It is one of the major ways the body maintains homeostasis. Although the kidneys are the main organs of excretion, several other organs also excrete wastes. They include the large intestine, liver, skin, and lungs. All of these organs of excretion, along with the kidneys, make up the excretory system. This lesson focuses on the role of the kidneys in excretion. The roles of the other excretory organs are summarized below:

• The large intestine eliminates solid wastes that remain after the digestion of food.
• The liver breaks down excess amino acids and toxins in the blood.
• The skin eliminates excess water and salts in sweat.
• The lungs exhale water vapor and carbon dioxide.

Urinary System

The kidneys are part of the urinary system, which is shown in Figure below. The main function of the urinary system is to filter waste products and excess water from the blood and excrete them from the body.

The kidneys are the chief organs of the urinary system.

Kidneys and Nephrons

The kidneys are a pair of bean-shaped organs just above the waist. A cross-section of a kidney is shown in Figure below. The function of the kidney is to filter blood and form urine. Urine is the liquid waste product of the body that is excreted by the urinary system. Nephrons are the structural and functional units of the kidneys. A single kidney may have more than a million nephrons!

Each kidney is supplied by a renal artery and renal vein.

https://www.ck12.org/book/CK-12-Biology/section/23.4/

Geometry

Work on your unit study guide.