College math placement test questions and answers |100% verified|

terms - 12, -3, x(variable), 15y, 11xy, -4x^2, -a, either a single number or variable, or numbers and variables multiplied together. Terms are separated by + or − signs Coefficients - # associated with each of those terms is called coefficient(12, -3, 1,15, 11, -4, -1, 3 expression - adding 1 or more terms together linear equation - equation has =sign. ex of linear eq: 4x+3=11 a linear equation is one that is dependent only on constants and a variable raised to the first power. For example, y=6x+2y=6x+2 is linear because it has no squares, cubes, square roots, sines, etc. Linear equations can always be manipulated to take this form: ax+b=0 rule - if you do something to one side of the equation, you must do it to the other how to solve a linear equation-4 steps - 1.) get rid of parentheses&combine like terms 2.) get all terms w/ the variable on one side& all other terms to other side - 3.) isolate variable by dividing 4.) check answer - percents - per=dividing, cents=100, like in a dollar 41% over 100 =.41 - take decimal place, move it two places to the right solving percent equations - "of"=multiply "is"= equals - "out of"=division 96% of what #is 72? - "what" or "what #" = x(the unknown) .96 times x =72 .96x over .96 =72 over .96, x= 72 divided by .96 x=75 7 is 4% of what #? - 7 = .04 times x ratios - A comparison of two quantities by division