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How are equivalent expressions used?
You can use them to find a variable. Lets say you have two equivalent expressions with the same variable... x + 2x - 42 = 0 2x - 28 = 0 If you combine these equivalent expressions you ahve... x + 2x - 42 = 2x - 28 In all of the expressions you have x = 7 There are also other applications but its confusing to explain.
When can you say a given expressions are polynomials?
you can say that it is polynomial if that have a exponent
What do expressions which use numbers or other symbols and an equal sign mean?
In mathematics, such expressions indicate that the value of the expression to the left of the equal sign has the same value as the expression to the right of the equal sign. In some cases, it can also be interpreted to mean that the expression on one side of the equal sign can be used in place of the expression on the other side of the equal sign (say in manipulating algebraic expressions). In computer languages, the equal sign is sometimes also used to indicate that the value of the expression to the right of the equal sign is to be transferred to the location indicated by the expression to the left of the equal sign. The expression to the left of the equal sign is usually a single variable that represents a memory location.
What is the algebraic expression for 5 more that a number divided by 9?
Let's say x is your "number" Remember, expressions do not have equal signs. If something in algebra has an equal sign, t is called an equation. (x/9) +5 would be your answer. Remember p.e.m.d.a.s. if asked to use that expression.
What does it mean when it says to simplify expressions?
it means to solve it Ex: 5-a a=1 so to simplify it, you would say 5-1=4 (p.s ur welcome :D)
