math honors exam stuff
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Created by:
gymnast73 on December 12, 2010
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Description:
stuff for our exam -cutbirth
Classes:
westminster kids, WESTMINSTER PEEPS!!!, westminster 10th grade, Westminster!!!, Westminster 8th grade chat room
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78 terms
Terms | Definitions |
|---|---|
 pythagorean theorem | a²+b²=c² |
| defn of abs value | abs of a=a if a≥0 and the abs value of a=-a if a<0 |
| zpp | if ab=0 then a=0 and/or b=0 |
| distance and rate formula | d=rt |
| slope formula | rise/run |
| standard form | Ax+By=C |
| point-slope form | y-y₁=m(x-x₁) |
| slope-intercept form | y=mx+b |
| intercept form | x/a+y/b=1 |
| ordinate | y axis |
| abssisica | x axis |
| collinear | in the same line |
| slope of vertical line | no slope(undefined) |
| slope of horizontal line | slope=0 |
| sum of all angles in a Δ | 180° |
| obtuse < | < over 90° and less than 180° |
| complementary < | 2<'s that add up to 90° |
| supplementary < | 2 <'s that add up to 180° |
| intercection | whats similar in 2 sets |
| union | put it all together what do you get |
| √x²= | ΙxΙ |
| natrual(n) #'s | 1,2,3,... |
| whole(w) #'s | 0,1,2,3... |
| integers(j or z) | ...-2,-1,0,1,2... |
| rational (q) #'s | all #'s that can be expressed as a fraction of 2 integers |
| irrational (irr or q') #'s | non terminating/repeating decimals |
| real(R)#'s | rationals U irr |
| formula for all diagonals | n(n-3)/2 |
| solve: ΙyΙ=-2 | no solution |
| A of a circle formula | A=πr² |
| A of a rectangle/square | A=LW |
| A of triangle formula | A=1/2bh |
| prime #'s | only factors are 1 and itself |
| composite # | w # w/ more than 1 prime factor |
| prime factored form | a #'s list of prime factors |
| variable | symbol used to represent a # |
| evaluate an expression | replace variables w/ values then simplify the numerical expression |
| solve an equation | use properties of equality to find a solution which is a value for the variable that makes the statement true |
| order of operations | PEMDAS |
| A of a trapezoid formula | A=h(b₁+b₂/2) |
| equation | a mathematical sentence that states that 2 quantities are= |
| ≠ | is not equal to |
| < | is less than |
| > | is greater than |
| ≥ | is greater than or = to |
| ≤ | is less than or = to |
| set | collection of objects |
| ordered pair | (x,y) |
| origin | (0,0) on the coordinate plane |
| probability(p) | ratio of favorable outcomes(winners)to all outcomes of the event(possibilities) |
| probability(p) formula | p=#winners/#of possibilities |
| statement | an equation or inequality that is true or false |
| like terms | have same variable raised to the same power |
| distributive property of multiplication over addition | a(b+c)=ab+ac |
| opposites | #'s that have the same abs value but are on opposite sides of 0 on # line |
| additive inverse | another word for opposite |
| --x= | +x |
| +x*-x= | -b |
| -x*-x= | +b |
| even # of -'s you get... | a positive(+) answer |
| odd # of -'s you get... | a negative(-) answer |
| scalar multiplication | multiply a number by a matrix |
| reciprocal | the reciprocal of p/c is c/p |
| closure property | a set S is closed under the operation ♥ if whenever A and B are in S, A ♥ B is in S |
| identity | an equation that is always true |
| extraneous solution | a solution that doesn't check |
| straight angle | 180° |
| right angle | 90° |
| acute angle | < between 0° and 90° |
| boundary algorithm | solve inequality like an equation then test all areas |
| equation of horizontal line | y=b |
| equation of vertical line | x=a |
| graph y=ΙxΙ looks like | a V with a slope of 1 |
| graph y=x² | a parabola |
| if 5x=8k whats the ratio of x to k? | 8:5 |
| constant | a # standing alone |
| coefficient | number in front of variable |
| relative frequency | experiment results |
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