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=__ Order of operations-an expression or string of symbols intended to represent a numerical value must follow commonly accepted and unambiguous rules.__= Here is a way you can remember Order o f Operations! PLEASE EXCUSE MY DEAR AUNT SALLY Ex.[5+6]4*5=

Open Sentence - is a mathematical sentence that contains one or more variables.
__Ex__. The following is an example of an open sentence 3x=5+y,11=8z,2a+4=b+c 1. The equation has one variable 2. A mathematical sentence with one or more variables is called an open sentence 3. So,'4(4s)= 3 is an open sentence** = = =Ordered Pairs= Are pairs that you find on the x and y axis of a coordinate grid Ex. the following is an example of an open sentence (3,2) ,(-3,-4),(10, 15)
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