college placement test-math Questions & Answers(GRADED A+)
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Course
College placement -math
Institution
College Placement -math
terms - ANSWER12, -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 - ANSWER# associated with each of those terms is called coefficient(12, -3, 1,15, 11, -4, -1, 3
...
either a single number or variable, or numbers and variables multiplied together.
Terms are separated by + or − signs
Coefficients - ANSWER# associated with each of those terms is called coefficient(12, -3, 1,15, 11, -4, -
1, 3
expression - ANSWERadding 1 or more terms together
linear equation - ANSWERequation 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 - ANSWERif you do something to one side of the equation, you must do it to the other
how to solve a linear equation-4 steps - ANSWER1.) get rid of parentheses&combine like terms
2.) get all terms w/ the variable on one side& all other terms to other side - ANSWER3.) isolate
variable by dividing
, 4.) check answer - ANSWER
percents - ANSWERper=dividing, cents=100, like in a dollar
41% over 100 =.41 - ANSWERtake decimal place, move it two places to the right
solving percent equations - ANSWER"of"=multiply
"is"= equals - ANSWER"out of"=division
96% of what #is 72? - ANSWER"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 #? - ANSWER7 = .04 times x
ratios - ANSWERA comparison of two quantities by division
proportions - ANSWERAn equation stating that two ratios are equal.
unit ratio - ANSWERA unit rate where the denominator is one unit
cross products - ANSWERThe 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 - ANSWERdistance=yards, feet, meters, centimeters, millimeters, miles, kilometers
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