College placement test-math latest update graded A+

College placement test-math latest update graded A+ 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 proportions An equation stating that two ratios are equal. unit ratio A unit rate where the denominator is one unit cross products The product of the numerator of one ratio and the denominator of the other ratio, can equal to each other and if they do, then it is proportional unit conversions distance=yards, feet, meters, centimeters, millimeters, miles, kilometers linear equations an equation between two