# MAF

 How do you draw a graph of 4x-3y=-24 ? INTERCEPT METHOD, set both values to zero how do you solve: x/2+y/3=1 x/4-y=11 What kind of problem is it? simultaneous equation First, find the LCD to get rid of the fractions x/2+y/3=1 becomes 6(x/2+y/3=1) multiply by the least common denominator then cross divide. equaling 2x+2y=6 do the same for the second x/4-y=11 multiply for the LCDthen cross divide, equalling: x-4y=44 then line each equation up and see which variables will cancel each other 6x+2Y=6x-4y=44 the Y will add up, only if they were positive and negative, so multiply by a 2. 2y-2y cancel solve for X, plug it in to the other equation.solve for Y To solve x/2+y/3=1 x/4-y=11 since it has an equal sign, what should u remember to do? Do what ever operation to both sides How many pounds of candy should there be? 3.75 5 ----- ------ x 35 set up the equation 3.75+5(35)= ( x+35) (4.25) multiply by a hunnet 375x + 5(35)(100)=(0+35)(425) Subtract the sum of 5x+3 & x2-x-8 from 3x-5 first, line them up and subtract,FOLLOW THE FLOW sum= subtract x2-x-8 5x+3---------------x2+4-5 now the 2nd part, subtract (3x-5) - (x2+4x-5) CHANGE THE SIGNS,then proceed to combine/do operations When you see (3x-5) - (x2+4x-5) what should you do? Use the subtraction to flip the 2nd equation expand (5x-7y)2 use the exponent to split it into 2 (5x-7Y) (5x-7Y) then FOIL Simplify (x-y)2 - (x-y)2 In order to simplify, you must first split them (x-y)(x-y)-(x+y)(x+y)then foil x2-xy-yx+y2 - (x2+xy+xy+y2) then combine Plane travels 150MPH with a head wind at 90 miles per hour, with a tail wind, what is the current speed? Set it up, You want to find current speed, you don't know it socurrent speed = X speed of wind= Y tail wind= x+y head wind is= x-y x+y=150x-y=90 add them together, 2x=240x=120 simplify (5-2+3-1)-1 (5-2+3-1)-1 First, change it into positive using the formula a-2 = 1 -- 2a so...(5-2+3-1)-1 1 1 -1- + -25 13Then solve what's inside simplify: (x7y4z8) 3 ---------- x2y5z4 move apples with apples, x5 z4 3------- Y then apply the exponent What is the scientific notation of 63425.93 first move the decimal creating a number from 1-10 63425.93 <------the number of times you move create the number 6.342593x104 left is positive right is negative Simplify using scientific notion (.24)(5000) --------------- .066 make it a number from 1-10the number of decimal counts determine the positive or negative 2.4x10-1 x 5x10-------------6x10-3 Factorize x3+72+6x Take out the x x(x2+7x+6) then do the A C method x(x2+7x+6) ^ What can multiply to 6 and equal to 7? 6+1 x(2x+6x+x+6) x(2x+6x)(x+6) 2x2(1+3x)(x+6) factor (25-Y2) find the square of the number 52 - Y2 then split it (5-y)(5+y) Solve x2-16=0 x2-16=0 ^ what 2 numbers equal 16Now factor (x+4)(x-4) Solve x(x-1)=2 x(x-1)=2 distribute x2-x-2=0 AC method will work.x-2)(x+1)=0 Set them both to 0x=2 x=-1 What is the quadratic formula? X=-B plus or minus(+ or -) square root B2-4AC--------------------------------------------------------------- 2A X=-B(+or-)squaroot(B2-4AC)2A How do you use the Quad formula? X+x2+x3 A+B+C, fill it in, solve AuthorAnonymous ID79582 Card SetMAF Description7,8,9 Updated2011-04-14T11:18:47Z Show Answers