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# Recent problems solved by 'HyperBrain'

Jump to solutions: 0..29 , 30..59 , 60..89 , 90..119 , 120..149 , 150..179 , 180..209 , 210..239 , 240..269 , 270..299 , 300..329 , 330..359 , 360..389 , 390..419 , 420..449 , 450..479 , 480..509 , 510..539 , 540..569 , 570..599 , 600..629 , 630..659 , 660..689 , 690..719, >>Next

 real-numbers/95763: Suppose a is a whole number and b is an irrational number. Is it possible for the broduct of ab to be a rational number?1 solutions Answer 79286 by HyperBrain(694)   on 2007-11-08 07:23:36 (Show Source): You can put this solution on YOUR website!It is possible if and only if because , a rational number Power up, HyperBrain!
 real-numbers/96124: Are all numbers "real" i.e., rational, irrational, intergers, whole numbers and natural numbers1 solutions Answer 79285 by HyperBrain(694)   on 2007-11-08 07:19:26 (Show Source): You can put this solution on YOUR website!Nope? there are IMAGINARY numbers... Examples: square root of negative numbers Power up, HyperBrain!
 real-numbers/97227: 5(2d)=(2d)5 these are my choices: True(cummutative property) True(associated property) False 1 solutions Answer 79284 by HyperBrain(694)   on 2007-11-08 07:15:44 (Show Source): You can put this solution on YOUR website!It is not associattive because you didn't change the grouping It is definitely NOT false It is the COMMUTATIVE PROPERTY OF MULTIPLICATION Power up, HyperBrain!
 real-numbers/97281: 8+3[24-2(14-2)]1 solutions Answer 79283 by HyperBrain(694)   on 2007-11-08 07:12:49 (Show Source): You can put this solution on YOUR website! Power up, HyperBrain!
 real-numbers/97464: 0.5b+3.4=0.2a-8.31 solutions Answer 79282 by HyperBrain(694)   on 2007-11-08 07:08:29 (Show Source): You can put this solution on YOUR website! Power up, HyperBrain!
 real-numbers/100693: WHAT ARE PROPERTIES?1 solutions Answer 79281 by HyperBrain(694)   on 2007-11-08 07:04:47 (Show Source): You can put this solution on YOUR website!A property is a statement that is true for all real numbers EXAMPLE: is a property Power up, HyperBrain!
 real-numbers/101757: Find the value of k so that 2x^2-kx+5=0 has one real rational root.1 solutions Answer 79280 by HyperBrain(694)   on 2007-11-08 07:00:22 (Show Source): You can put this solution on YOUR website! has one root if and only if Since has one real root, then, thus, or Power up, HyperBrain!
 real-numbers/108192: list 15 rational numbers in decimal form that are repeating decimals but not intergers1 solutions Answer 79279 by HyperBrain(694)   on 2007-11-08 06:54:26 (Show Source): You can put this solution on YOUR website! THAT'S more than 15. Try it! Divide then some digits will be repeated] Power up, HyperBrain!
 real-numbers/108683: can a number be rational and irrational at the same time?1 solutions Answer 79278 by HyperBrain(694)   on 2007-11-08 06:50:07 (Show Source): You can put this solution on YOUR website!No, they can never be rational and irrational at the same time----- Power up, HyperBrain!
 Numeric_Fractions/108589: 1+11 solutions Answer 79277 by HyperBrain(694)   on 2007-11-08 06:43:43 (Show Source): You can put this solution on YOUR website! Power up, HyperBrain!
 Equations/108547: Find the Greatest Common Factor of the numbers or monomials. 45,75 Any help with this equation would be greatly appreciated:)1 solutions Answer 79276 by HyperBrain(694)   on 2007-11-08 06:35:10 (Show Source): You can put this solution on YOUR website!Let's divide and divide... Since we divided by 5 and 3, the GCF of 45 and 75 is Power up, HyperBrain!
 Equations/108550: Find the Least Common Multiple of the numbers or monomials. 22. 5,14 Any help with this equation would be greatly appreciated:)1 solutions Answer 79275 by HyperBrain(694)   on 2007-11-08 06:27:09 (Show Source): You can put this solution on YOUR website!These number are also relatively prime(their common factor is only ) So, their least common multiple is Power up, HyperBrain!
 Equations/108562: Use the LCD to determine which fraction is greater 27. 5/2,7/3 Any help with this equation would be greatly appreciated:)1 solutions Answer 79274 by HyperBrain(694)   on 2007-11-08 06:15:49 (Show Source): You can put this solution on YOUR website! Let's compare and ? ? ? ? NOte: if two fractions are given to be and , and p < q, then is greater than Thus, is greater than and therefore, is greater than SINCE 2 and 3 are prime to each other then their least common multiple (LCM) is Power up, HyperBrain!
 Graphs/108745: a taxicab ride that is 2 miles long cost \$7. One that is 9 miles long cost \$24.50. Write an equation relating cost to length of ride.1 solutions Answer 79273 by HyperBrain(694)   on 2007-11-08 05:58:27 (Show Source): You can put this solution on YOUR website!Let x=the x-coordinate ____y=the y-coordinate Here, I want the x-coordinate to be the no. of miles and the y-coordinate to be the price. So, the points are (,) , (,) Let's find the slope slope==== Now, let's use the slope-intercept form where m=slope and b=y-intercept m=2.5 but b is unknown. So, let's use (2,7) for x=2 and y=7 Thus, the equation is Which is interpreted as "the price is calculated by multiplying the no. of miles by 2.5 and by adding 2 to the result" Graph: Power up, HyperBrain!
 Trigonometry-basics/108496: the width of a rectangle is 2 units less than its length. if the diagonal of the rectangle is 10 units long, find the dimensions of the rectangle.1 solutions Answer 79125 by HyperBrain(694)   on 2007-11-07 05:41:26 (Show Source): You can put this solution on YOUR website!The Phytagorean Theorem can be applied! Let a=x(the length) ____b=x-2(the width) ____c=10 Thus, By the quadratic formula, We will eliminate the part 'coz it will be only negative---an impossible result Continuing, Thus, the length is 8.2801098892805 units long If x=8.2801098892805, then x+2=10.2801098892805 Thus, the width is 10.2801098892805 units long Power up, HyperBrain!
 Pythagorean-theorem/92124: a triangle has 6 sides , w y z and y z x find the missing part. wz= 6 , zx=8 , and wy = 9, find xy , the base is w z x1 solutions Answer 79124 by HyperBrain(694)   on 2007-11-07 05:39:02 (Show Source): You can put this solution on YOUR website!Please change your problem because i know that no triangle has 6 sides otherwise it will be a hexagon
 Coordinate-system/107847: find a graph for: 1/2 x-4 2x-4 1/2x+4 2x+41 solutions Answer 79122 by HyperBrain(694)   on 2007-11-07 05:34:24 (Show Source): You can put this solution on YOUR website!Graph of : Graph of : Graph of : Graph of : Power up, HyperBrain!
 Coordinate-system/107848: complete the following table for the equation: y=6x-5 x -3 -1 __,__ y __,__,2, 4 1 solutions Answer 79121 by HyperBrain(694)   on 2007-11-07 05:30:13 (Show Source): You can put this solution on YOUR website!x -3,-1,__,__ y __,__,2, 4 If x=-3, y=6x-5=6(-3)-5=-18-5=-23 Put this, x -3,-1,__,__ y -23,__,2, 4 If x=-1, y=6(-1)-5=-6-5=-11 Putting this, x -3,-1,__,__ y -23,-11,2, 4 Given that y=6x-5, IF y=2, Putting this, x -3,-1,,__ y -23,-11,2, 4 If y=4, Finalizing -----therefore, the COMPLETED table is x -3,-1,, y -23,-11,2, 4 Power up, HyperBrain!
 Exponents/107955: (5ab)(-2a^2b)^31 solutions Answer 79120 by HyperBrain(694)   on 2007-11-07 05:16:12 (Show Source): You can put this solution on YOUR website! Power up, HyperBrain!
 Percentage-and-ratio-word-problems/108489: Kit earned 75 points out of 80 possible on her test. Write the decimal equivalent of this fraction. 1 solutions Answer 79119 by HyperBrain(694)   on 2007-11-07 05:00:58 (Show Source): You can put this solution on YOUR website!We will just divide! Power up, HyperBrain!
 expressions/108491: Evaluate. | –12 | – | –10|1 solutions Answer 79118 by HyperBrain(694)   on 2007-11-07 04:58:18 (Show Source): You can put this solution on YOUR website!Just eliminate the negative signs! Power up, HyperBrain!
 Expressions-with-variables/108492: Write the following phrase using symbols. Use the variable x to represent the number. Eight less than three times a number 1 solutions Answer 79117 by HyperBrain(694)   on 2007-11-07 04:56:26 (Show Source): You can put this solution on YOUR website!Three times a number is represented as . therefore, eight less than three times a number is Power up, HyperBrain!
 Money_Word_Problems/108493: Evaluate. 42 + 2 7 – (5 4 – 15)1 solutions Answer 79116 by HyperBrain(694)   on 2007-11-07 04:43:11 (Show Source): You can put this solution on YOUR website! Power up, HyperBrain!
 decimal-numbers/105017: Write six and seven thousand, four hundred thirty-three ten thousandths in standard form.1 solutions Answer 78949 by HyperBrain(694)   on 2007-11-06 06:16:00 (Show Source): You can put this solution on YOUR website!67 000.0433 Power up, HyperBrain!
 Geometry_Word_Problems/108309: The perimeter of a rectangle is to be no greater than 300 in., and the length must be 125 in. Find the maximum width of the rectangle. 1 solutions Answer 78945 by HyperBrain(694)   on 2007-11-06 05:17:11 (Show Source): You can put this solution on YOUR website! perimeter=2*(length+width) Let x=length ____y=width ____2(x+y)=perimeter The perimeter of a rectangle is to be no greater than 300 in., But, (the length must be 125 in).So, Thus, the maximum measure of the width is 25 inches Power up, HyperBrain!
 Graphs/108314: Solve the system by addition. 5x – 3y = 13 4x – 3y = 11 1 solutions Answer 78944 by HyperBrain(694)   on 2007-11-06 05:11:39 (Show Source): You can put this solution on YOUR website! 5x – 3y = 13 4x – 3y = 11 Multiplying by , Adding this to , ~~~~~~~~~~~~~~~~~~~~~~~~~ 5x-3y=13 ~~~~~~~~~~~~~~~~~~~~~~~~ -4x+3y=-11 ___________________________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~ x =2 Solving for y, Thus, Power up, HyperBrain!
 Graphs/108315: Solve the system by addition. 4x – 6y = –1 8x + 3y = 3 1 solutions Answer 78942 by HyperBrain(694)   on 2007-11-06 05:04:32 (Show Source): You can put this solution on YOUR website!4x – 6y = –1 8x + 3y = 3 Multiplying by , Adding to , ~~~~~~~~~~~~~~~~~~~~~~~~~~~~16x+6y=6 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4x-6y=-1 ______________________________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~20x =5 Solving for y, Thus, and Power up, HyperBrain!
 Graphs/108316: Solve the system by substitution. 3x – y = –7 x + y = –9 1 solutions Answer 78941 by HyperBrain(694)   on 2007-11-06 04:58:55 (Show Source): You can put this solution on YOUR website! but, . So, Solving for y, THerefore, x=-5 and x=-4 Power up, HyperBrain!
 Equations/108258: You can evaluate the expression 112 - p to find the number of pencils you have left from a package of 112 pencils after you have distributed p pencils among your classmates. Find the number of pencils you have left after distributin 56 pencils.1 solutions Answer 78940 by HyperBrain(694)   on 2007-11-06 02:18:52 (Show Source): You can put this solution on YOUR website!Here, p=56 so, Therefore, 56 pencils are left Power up, HyperBrain!
 absolute-value/104404: if 5 is added to a number the result is 131 solutions Answer 78937 by HyperBrain(694)   on 2007-11-06 01:44:43 (Show Source): You can put this solution on YOUR website!Let x =the number IF 5 is added to a number and the result is 13, Thus, the number is 8. Power up, HyperBrain!
 Inverses/96664: If f(x)= 5x+1, the what is its inverse function?1 solutions Answer 78936 by HyperBrain(694)   on 2007-11-06 01:40:46 (Show Source): You can put this solution on YOUR website!Let y=f(x) So, To get the inverse, let's solve for x Replacing the x to y and y to x, THus, the inverse function, Power up, HyperBrain!