Chapter7: Rational Expressions And Functions
Section7.5: Solve Applications With Rational Equations
Problem 7.105TI: The number of hours it takes for ice to melt varies inversely with the air temperature. Suppose a...
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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.
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The density of an object can be found by taking its mass and dividing by its volume.
Write an equation to represent the relationship between the three quantities (density, mass, and volume) in each situation. Let the density, D, be measured in grams/cubic centimeters (or g/cm3).
- The mass is 500 grams and the volume is 40 cubic centimeters.
- The mass is 125 grams and the volume is v cubic centimeters.
- The volume is 1.4 cubic centimeters and the density is 80 grams per cubic centimeter.
- The mass is m grams and the volume is v cubic centimeters.
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