GRAPHIC SET COMPLETION OF THE VARIABLE LINEAR INEQUALITIES

Graph linear inequalities himpunanan completion of one variable already discussed when we learn mathematics in junior high. However, to recall look at some examples below.
example 1
Determine the area of ​​the settlement of
a. X ≥ 0
b. Y ≥ 0
c. X <2
d. X ≥ -1
e. 2 ≤ x ≤ 4
answer

EXAMPLES OF PROBLEMS MATH MODEL STORY (SENTENCE VERBAL)

Example 1To make a required 200 grams of bread flour and 25 grams of butter. As for the B required 100 grams of bread flour and 50 grams of butter. Flour is available only 4 kg and 1.2 kg of butter available. if the price of bread A Rp.400, 00 and the price of bread B rp. 500.00. Make mathematical models.AnswerSuppose A lot of bread and more bread = x B = y, then the other variable is the flour and butter. Thus obtained the following table:Bread variable A (x) Bread B (y) InventoriesFlour 200 grams 100 grams 4000 gramsButter 25 grams 50 grams 1200 grams

METAMORPHOSIS IN THE FROG

Different frog metamorphosis of insects, because frogs do not undergo change of skin. Zygote initially develops into a tadpole (tadpole). Tadpoles have no legs but has a tail and fins. Furthermore grows hind legs. Substitution organ in frog metamorphosis adapted to the habitat changes from water to land. Gills change shape and function of a lung, tadpoles initially no legs, and tail disappeared. The process of removal of the tail through autofagositosis, meaning lysosomes in the cells of the cell takes its own tail.
Thyroxine hormone plays a role in frog metamorphosis. If the function of the thyroid gland in tadpoles inhibited, for example by cutting, failed to take place so that the tadpole metamorphosis remain a tadpole.

POPULATION DENSITY

Agrarian population density
Agriculture means the same as a farm or in this agricultural area. Population density is the ratio anatara agrarian peasant population to the area of agriculture. In this case, which serve as the basis for calculation is the number of farmers and agricultural land available in the area. Agrarian population density can be calculated by the following formula

Agrarian population density (KPA) = (sum of the farming population of an area) / (agricultural land)
Physiological population density
Kepadata physiological population is almost equal to the agrarian population density, because the denominator samam vast agricultural areas. The difference with the agrarian population densities are calculated throughout the region, not just a livelihood as farmers. Thus, physiological population density pedatan using the following formula senagai.
Physiological Population density (KPF) = (number of inhabitants of a region) / (agricultural land)

FLORA AND FAUNA IN INDONESIA

Flora and fauna in Indonesia is broadly divided into three zones, namely asiatis, transition, and australis. Prior to the search of ice or glacial era, western part of Indonesia includes Sumatra, Java, Borneo, and the small islands around it, and shallow seas are old Sunda land flora and fauna zone called Sunda. Covers the eastern part of Papua which formerly united with Australia so the flora and fauna grow Australian flora and fauna called Australia.In the center there is an area of ​​deep-sea areas, so the flora and fauna has a style of its own and called intermediate flora fauna. Flora and fauna of the region bounded Wallace and Weber lines. Wallace Line separating the flora and fauna Asiatis the transition area located in the southern Philippines to the south. As for the Huxley, the line straightened out in the west Philippine archipelago. Lines Weber restrict the flora fauna flora fauna Australis with the transition region.

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