Use the information in the following paragraph to answer Questions 1-5. Show all of the work for your calculations; do not just give the answer. In a hypothetical city, there is a population of 60,000 people. During the year 2000, there were 1,285 deaths from all causes. All new cases of disease "X" have been accounted for and they total 1,927 (625 males and 1,302 females). During the year 2000 there were 147 deaths from disease "X", 42 of them in males. 1. What is the incidence rate per 100,000 population? 2. What is the crude death rate for all causes per 1,000 population? 3. Assuming a male population of 33,000 and a female population of 27,000, what is the sex-specific incidence rate for disease "X", and sex-specific mortality rate for males and females for disease "X"? (For incidence, assume the entire population is at risk for disease "X") 4. Assuming there were no existing cases of disease "X" at the end of 1999, what is the case-fatality rate? 5. Assume the number of existing cases of disease "X" at the end of 1999 is 3,569. What is the prevalence rate of disease "X" per 100,000 population at the end of the year 2000?

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A: We add sqrt(2x+9) to both sides

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A: Distribute 3 and 2 first.

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A: we first distribute the equation, Then combine like term on same side.

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.