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Arthur D.'s Resources

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using algebra... x+(x+1)+(x+2)=84 3x+3=84 3x=81 x=27 x+1=28 x+2=29 27, 28, 29 are the integers   using arithmetic... 84/3=28, the mean of the numbers and also the middle number of the three numbers 28-1=27 28+1=29 27,...

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a number written in scientific notation is written as a product of two numbers one number is between 1 and 10 and the other number is a power of ten one reason to write a number in scientific notation is to eliminate trailing zeroes and write the number in a physically shorter format 2,080,000,000 you...

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(2/x)-(1/x2)=-3 multiply both sides by x2 2x-1=-3x2 3x2+2x-1=0 factor (3x-1)(x+1)=0 3x-1=0 3x=1 x=1/3 x+1=0 x=-1 the solutions are -1 and 1/3  

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assuming it's a regular hexagon... there are 6 congruent triangles the area of any one is given by the formula... A=(a^2)tan(180/n) where a=apothem and n=number of sides or number of congruent triangles (6) A=(23^2)tan(180/6) A=529(tan 30º) A=(529)(√3/3) A=(529)(0.57735) A=305...

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350% of 42=? 350%=3.5 or 3 1/2 3 1/2 * 42=3*42 + (1/2)*42=126+21=147 greater than 100 but less than 150

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  3y+15=5x 3y=5x-15 y=(5/3)x-5 choose values for x that are divisible by 3 to get integer y-values x=0,  y=-5 x=3,  y=0 one more for good luck x=6,  y=5   the line looks like this:                                                     ...

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make a table of x's and y's and graph on the coordinate plane, the x-axis and y-axis y=-1+x pick values for x and determine the corresponding y values x=0,   y=-1,   (0,-1) x=1,   y=0,    (1,0) x=2,   y=1,    (2,1) x=-2, ...

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prob and odds (answer)

the odds in favor of an event are 1 to 7 this means the event occurs 1 time for every 7 times it does not occur the probability that the event occurs is 1/8 the probability that the event does not occur is 7/8 if you roll a die the odds of rolling a 3 is 1 to 5  (there...

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