Equations are used to give a mathematical analysis of events or situations in the real world.
literal equations? maybe you mean linear equations? Please edit and resubmit your question if that is what you meant.
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The additive inverse is used to solve equations; equations, in turn, are used to model many real-world situations.
Gaussian elimination is used to solve systems of linear equations.
Quadratic equations appear in many situations in science; one example in astronomy is the force of gravitation, which is inversely proportional to the square of the distance.
we can cross multiply the two equivalent equations and then find the fourth proportional
They aren't.
Equations are used to give a mathematical analysis of events or situations in the real world.
literal equations? maybe you mean linear equations? Please edit and resubmit your question if that is what you meant.
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The additive inverse is used to solve equations; equations, in turn, are used to model many real-world situations.
Kinematics does not require constant acceleration. There are different equations for different situations. So some of the equations will be valid even when the acceleration is not constant.
They all show the values for a set of variables for different situations or outcomes.
Gaussian elimination is used to solve systems of linear equations.
A dependent system is defined as "a system of equations that has infinite solutions." It is an equation that is used in various mathematical situations.
I'm not sure if it is book A, but if it is about writing and graphing equations to model situations, then it is "they are tearable".