ALEKS BASIC MATH PLACEMENT TEST REVIEW QUESTIONS AND VERIFIED ANSWERS

percent to fraction


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percent as numerator and 100 as denominator, then simplify




negative exponents...

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CANNOT EXIST, so you must make it into a fraction




how to find domain with a given equation


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-if a fraction, set denom. to zero, then solve
-in equation, plug in 0 for x
usually can be a + or - solution




fraction to percent


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1) do long division with denom as outside and numerator as inside
2) move decimal over 2 places to make it into a %
do not forget decimal
ORRRR
make denom 100 (multiply num and denom of original fraction by whatever
to get it to 100)




Associative Property


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, Changing the grouping of numbers will NOT change the value
ex: (a+b)+c=a+(b+c)




adding and subtracting fractions


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-make denoms the same
-add/subtract numerators




sin, cos, tan
what is each side?


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SOHCAHTOA
hypotenuse= always across from largest angle measurement
adjacent= (depending on what angle you're looking for) is always along the
side with the missing angle
opposite= opposite from the angle you're trying to find




Compounded Interest


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use when problem says annually
A= P (1+r)^t