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Math Review of Inequalities 150 150 Deborah

Math Review of Inequalities

Overview While equations are statements that two quantities are equal, inequalities state that quantities are not equal. One side of the expression might be greater than the other side, or one side of the expression may be less. Correct solutions for variables encompass more than one number. Inequalities Inequalities include symbols such as greater than…

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Math Review of Percents 150 150 Deborah

Math Review of Percents

Overview Percents are special types of ratios that compare the number to 100. Similar to any ratio, a percent can be expressed as a fraction. Since percents compare to 100, they can also be expressed in decimal form. Fractions to Percents Percent or the percent sign (%) means “per 100,” so 5% means the same…

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Math Review of Rates, Ratios, and Proportions 150 150 Deborah

Math Review of Rates, Ratios, and Proportions

Overview A rate compares 2 quantities that have different types of units, such as kilometers per hour or miles per gallon. A ratio compares quantities with the same type of units by dividing the quantity in the numerator by the quantity in the denominator, as in a fraction. A proportion states that 2 ratios are…

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Biology Review of Populations 150 150 Deborah

Biology Review of Populations

Overview Populations of any type of plant or animal gather in a particular habitat. They exist in a particular geographic distribution, have a distinct density, growth rate, and age structure. Populations grow and change by an interplay of elements, such as the amount and number of predators, the availability of food, water, and other conditions…

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Biology Review of Humans in the Biosphere 150 150 Deborah

Biology Review of Humans in the Biosphere

Overview Discussions of different types of ecosystems often include the many species of plants and animals that are native to a particular biome, with one important exception: the human animals who live there. Human activities have changed the biosphere in many ways. Human Activities Some of the types of human activities that have changed the…

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English Review: Editing the Essay 150 150 Deborah

English Review: Editing the Essay

Overview The essay is nearly in its final form. Congratulate yourself, because you’ve done a lot of work since those first few words. Your thesis statement is formalized, and drafts have been rewritten. It’s now time to look at the essay from a different perspective before turning it in to the instructor. Revising or Editing?…

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English Review: Revising the Essay Draft 150 150 Deborah

English Review: Revising the Essay Draft

Overview The essay began with an idea, which expanded into a thesis statement, a draft outline, a draft introduction, and paragraphs on a page. By this time, writers have some idea of where the essay is going, and it’s time to start revising. Where to Start It is possible to read over the draft and…

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Math Review of Two-Step and Multi-Step Equations 150 150 Deborah

Math Review of Two-Step and Multi-Step Equations

Overview Not all equations can be solved in one step. Many take several steps to solve, but the principles of solving one-step equations can be applied. Use the order of operations to simplify the equation; math properties to combine like terms; then apply inverses to isolate the variable on one side of the equation in…

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Math Review of One-Step Equations 150 150 Deborah

Math Review of One-Step Equations

Overview Some algebra equations can be solved with one step, using operations such as addition, subtraction, multiplication, and division. In order to solve them, use inverse operations so that the variable is on one side and real numbers are on the other side. Then, solve the problem with arithmetic. Balanced Equations An equation is solved…

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Biology Review of Land Biomes 150 150 Deborah

Biology Review of Land Biomes

Overview Biomes are environments that usually have similar climate, physical conditions, and broad general features. Similar organisms tend to gather in areas where they can thrive, because the climate and geographic location support comparable populations of plants and animals. Tropical Biomes Some types of tropical biomes include tropical rain forests, tropical dry forests, and tropical…

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