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COLLEGE MATH PLACEME NT
EXAM PREP (LATEST UPDATE)
QUESTIONS AND VERIFIED
ANSWERS | 100% CORRE CT |
GRADE A
Question 1: What are terms?
CORRECT 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
Question 2: What are coefficients?
CORRECT ANSWER: # associated with each of those
terms is called coefficient(12, -3, 1,15, 11, -4, -1, 3
Question 3: What is an expression?
CORRECT ANSWER: adding 1 or more terms together
Question 4: What is a linear equation?
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CORRECT 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
Question 5: What is the rule for solving equations?
CORRECT ANSWER: if you do something to one side
of the equation, you must do it to the other
Question 6: How do you solve a linear equation in 4
steps?
CORRECT 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 3.) isolate variable by dividing 4.) check answer
Question 7: What are percents?
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CORRECT ANSWER: per=dividing, cents=100, like in
a dollar 41% over 100 =.41 take decimal place, move it two places to the right
Question 8: How do you solve percent equations?
CORRECT ANSWER: "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
Question 9: What are ratios?
CORRECT ANSWER: A comparison of two quantities
by division
Question 10: What are proportions?
CORRECT ANSWER: An equation stating that two
ratios are equal.
Question 11: What is a unit ratio?
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CORRECT ANSWER: A unit rate where the
denominator is one unit
Question 12: What are cross products?
CORRECT 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
Question 13: What are unit conversions?
CORRECT ANSWER: distance=yards, feet, meters,
centimeters, millimeters, miles, kilometers
Question 14: What are linear equations?
CORRECT 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
Question 15: What is a common denominator?
CORRECT ANSWER: A denominator that is the same
in two or more fractions.