The type of construction you will encounter and the types of munitions available to the breaching element
The idea is to work with the same variables, but it is possible that some of the variables are missing in some of the equations.
A science project that has variables can be an experiment that aquires for variable change.
Checking some elses personal data would mean you are breaching privacy laws
Because mathematical formulas can only describe dynamic changes if some elements (variables) vary in relation to other variables.
There is no such thing as definite variable in mathematics. Some of the variables in mathematics are independent and dependent variables. More variables are usually found in probability textbooks.
The answer depends on the context. Some examples:when dealing with fractions they are numbers with different denominators,when dealing with surds, they are terms which, in their simplified form have different expressions under the radical.when dealing with algebraic terms, they are terms in which the exponents of the variables are different.
Some variables are if it is new or old, hot or cold, diet or normal
Controlled variables are things that may effect the outcome of an experiment, like temperature are pressure or the amount of some substance used. Dependent variables are those which change due to the conditions mentioned above. These might be speed of the reaction, or the quantity of some product.
Many real life physics problems are parabolic in nature. Parabolas can be shown as a quadratic equation. If you have two variables then usually you can use the equation to find the best solution to a problem. Also, it is a beginning in the world of mathematical optimization. Some equations use more than two variables and require the technique used to solve quadratics to solve them. I just ran an optimization of 128 variables. To understand the parameters I needed to set I had to understand quadratics.
carpentry is dealing with wood
heart surgery
dealing with death