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college placement test-math questions and answers
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college placement test-mathterms - Answer -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 - Answer -# associated with each of those terms is called coefficient(12, -3,
1,15, 11, -4, -1, 3
expression - Answer -adding 1 or more terms together
linear equation - Answer -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 - Answer -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 - Answer -1.) get rid of parentheses&combine like
terms
2.) get all terms w/ the variable on one side& all other terms to other side - Answer -3.)
isolate variable by dividing
4.) check answer - Answer -
percents - Answer -per=dividing, cents=100, like in a dollar
41% over 100 =.41 - Answer -take 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 #? - Answer -7 = .04 times x
ratios - Answer -A comparison of two quantities by division
proportions - Answer -An equation stating that two ratios are equal.
unit ratio - Answer -A unit rate where the denominator is one unit
cross products - Answer -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 - Answer -distance=yards, feet, meters, centimeters, millimeters, miles,
kilometers
linear equations - Answer -an equation between two variables that gives a straight line
when plotted on a graph
variable. 1st power. no second or higher power on any #s
common denominator - Answer -A denominator that is the same in two or more
fractions.
clear the fraction - Answer -multiply whole equation by CD
x-coordinate - Answer -the first number in an ordered pair
x-coordinate - Answer -corresponds to a number on the x-axis
y-coordinate - Answer -the second number in an ordered pair
y-coordinate - Answer -corresponds to a number on the y-axis
4 quadrants - Answer -on graph, goes in c formation from 1-4
line is the graph of the - Answer -equation
x-intercept - Answer -the point where a graph intersects the x-axis
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