Student Planner 2013-14 - Pinkerton Academy

MATHEMATICS REFERENCES (continued)Formulasstandard form of a vertical line x = astandard form of a horizontal line y = bstandard form of a slanted line Ax + By = Cslope intercept form of a slanted line y = mx + bslope formula2 1m y −=yx2 − x1x1 ≠ x2distance formulad = x − x + y − y( )2 2( ) ( )2 1 2 1⎛ x 1+ x 2 1 2midpoint formula,y + y ⎞⎜⎟⎝ 2 2 ⎠distance = rate⋅ time d = rtsimple interest formula I = Prtrcompound interest A = P( 1 +)nnt(A-amount, n-# of interest periods/yearr = interest rate, P=principal,t = # of years)standard form of a quadratic equation 2ax + bx + c = 0 , a ≠ 0quadratic formula2− b ± b −4acx = , a ≠ 02a____________________________________________________________________________________STANDARD ORDER OF OPERATIONS1. symbols of inclusion ( ),[ ],{ } (from left to right)2. exponents and roots (from left to right)3. multiplication and division (from left to right)4. addition and subtraction (from left to right)______________________________________________________________________________________CUSTOMARY UNITS OF MEASUREMATHEMATICAL SYMBOLSlength 1 ft =12 in ± plus or minus1 yd = 3 ft = 36 in ≈ approximately1 mi = 5280 ft = 1760 yd approximatelyweight 1 lb = 16 oz ≅ congruent to1 T = 2000 lbxsquare root of xcapacity 1 c = 8 fl oz n xthn root of x1 pt = 2 c = 16 fl oz > is greater than1 qt = 2 pt = 4 c < is less than1 gal = 4 qt = 8 pt = 16 c = 128 fl oz ∞ infinity parallel tox absolute value of x⊥perpendicular toπ pi ( ≈ 3.14159 or 227 )_____________________________________________________________________________________METRIC UNITS OF MEASURElength km hm dam meter dm cm Mmmass kg hg dag gram dg cg Mgcapacity kl hl dal liter dl cl MlAppendix