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# Recent problems solved by 'Fombitz'

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 Numbers_Word_Problems/350228: a number is much as greater than 31 as is less than 55. the number is what?1 solutions Answer 250323 by Fombitz(13828)   on 2010-09-30 14:20:51 (Show Source): You can put this solution on YOUR website! THe number is 42.
 Travel_Word_Problems/350212: A car travels at 60 mph east for 20 min then at 30 mph east for 30 minutes. What is the average speed and average velocity?1 solutions Answer 250322 by Fombitz(13828)   on 2010-09-30 13:55:42 (Show Source): You can put this solution on YOUR website!Rate*Time=Distance . . . miles miles Total distance traveled= miles Total time traveling=hr Average speed:mph . . Let positive x be East. Let positive y be North. Starting position:(,) East displacement:(,)+(,) Final position:(,)+(,)=(,) Time:hr Average velocity:=(,)
 Average/350213: How many 1/2 inch squares can you get from a sheet of paper that is 8 1/2 x 11.1 solutions Answer 250321 by Fombitz(13828)   on 2010-09-30 13:48:11 (Show Source): You can put this solution on YOUR website!Look at the total area for a sheet of paper that is 8.5x11. Each square has an area of, So then the total numbers of squares in the paper are,
 Quadratic_Equations/350105: Triangle ABC is isosceles. AB = x and BC = 2x-4 a) find two possible values for x if the perimeter of triangle ABC is 32 b)how many possible values are there for x if the perimeter of triangle ABC is 121 solutions Answer 250320 by Fombitz(13828)   on 2010-09-30 13:45:26 (Show Source): You can put this solution on YOUR website!a) Either or or or or . . . b) Same equations apply, just different right hand side. or or or Only 1, .
 Proportions/350183: Solve each proportion and then check. x/12-x = 5/15 Help me please, I am so stuck!1 solutions Answer 250319 by Fombitz(13828)   on 2010-09-30 13:42:12 (Show Source): You can put this solution on YOUR website! Now solve for .
 Mixture_Word_Problems/350207: forty ounces of a 30% gold alloy are mixed with 60oz of a 20% gold alloy. Find the percent concentration of the resulting gold alloy1 solutions Answer 250318 by Fombitz(13828)   on 2010-09-30 13:40:57 (Show Source): You can put this solution on YOUR website!Let X be the new concentration, The new alloy is 24% copper.
 Rational-functions/350187: Need help. Find all real solutions. 1/p-2/√9p+1=01 solutions Answer 250317 by Fombitz(13828)   on 2010-09-30 13:38:12 (Show Source): You can put this solution on YOUR website!You need to use parentheses to differentiate expressions, numerators, and denominators. Is either of the two below what you're after??? . . . 1. or 2.
 Linear-equations/350205: Hey I have a table of values chart and I need to find out the equation that fits a linear model, quadratic model and exponential model. Can You just help me out with what I have to do to plug in the values into which equation. The table of values chart is below: X = (Y) 1 =(14 000) 2 =(9100) 3 =(4000) 4 =(4000) 5 =(3000) How do i find out the linear model, quadratic model and exponential model for this table. Please can someone help me...ive been stuck on this question for a long time...Thank You!1 solutions Answer 250316 by Fombitz(13828)   on 2010-09-30 13:34:10 (Show Source): You can put this solution on YOUR website!If you have data and want to fit a curve, first step is to graph the data. . . . If you have to find the linear, exponential, and quadratic model to fit the data, the quickest and easiest way is to use EXCEL's Chart Wizard, then fit a trendline using a linear, exponential, and quadratic model. When you "Add Trendline" click on the Options tab to display the equation on the chart. Then you'll have all of the coefficients for the equation. . .
 Proportions/350203: For most flying creatures, the length of thewing varies inversely as the number of wingbeats per second. A dragonfly has a winglength of 1.6 inches and a wingspeed of 45 times per second. If a bee has a wingspeed of 200 beats per second, what is the lenghth of a bee's wing? (Simply work the problem through; you do not need a 5-step solution.) HELP! I don't know what to do!! Please!!1 solutions Answer 250315 by Fombitz(13828)   on 2010-09-30 13:27:18 (Show Source): You can put this solution on YOUR website!Re-read the probem, there's an equation in there. . . "the length of the wing varies inversely as the number of wingbeats per second." , where is the wing length (inches), is the wing speed(beat/sec). Use the data provided... Now solve for .
 Rational-functions/350190: please check my equation and let me know if I'm missing a step. Thank you 3(6-4x)=2(-6x+9) 18-4x =-4x+18 +4 +4 18 = 181 solutions Answer 250313 by Fombitz(13828)   on 2010-09-30 13:23:30 (Show Source): You can put this solution on YOUR website!3(6-4x)=2(-6x+9) 18-4x =-4x+18<--- 3*4x=12x not 4x on the left hand side, 2(-6x)=-12x not -4x on the right hand side +4 +4 18 = 18
 Equations/350202: question 1 The slope of a line is -7/10 . The point (10, 3) is on the line. Determine the equation of this line. question 2 The slope of a line is -3/4 . The point (8, -5) is on the line. Determine the equation of this line. question 3 The slope of a line is 1/9 . The point (-9, -11) is on the line. Determine the equation of this line. question 4 The slope of a line is 1/8 . The point (-8, -5) is on the line. Determine the equation of this line. Thanks!1 solutions Answer 250312 by Fombitz(13828)   on 2010-09-30 13:20:45 (Show Source): You can put this solution on YOUR website! I'll show you how to do one. You finish the rest. Start with point-slope form, . . . The rest are done the same way.
 Graphs/350076: Please help me solve this equation: Use pascal's triangle to determine the binomial expansion for the following and simplify the final expansion. (a) (b) 1 solutions Answer 250311 by Fombitz(13828)   on 2010-09-30 13:18:03 (Show Source): You can put this solution on YOUR website!a) . . . b) . . . Simplify.
 Numbers_Word_Problems/350126: If the product of some number and three is increased by eight, the result is five times the number. What is the number?1 solutions Answer 250310 by Fombitz(13828)   on 2010-09-30 13:13:20 (Show Source): You can put this solution on YOUR website!Let the number be .
 Equations/350201: The slope of a line is 20 and the point (3, 5) is on the line. Express the line in slope-intercept form.1 solutions Answer 250308 by Fombitz(13828)   on 2010-09-30 13:09:32 (Show Source):
 Triangles/350106: The measure of exterior angle of an isosceles triangle is x degrees . what are the possible angle measures of the triangle in terms of x ? describe all the possible values of x1 solutions Answer 250307 by Fombitz(13828)   on 2010-09-30 13:08:23 (Show Source): You can put this solution on YOUR website!If the exterior angle is x, the interior angle is . . . . If the interior angle,, is the vertex angle, then The base angles, , would equal . . . . If the interior angle,, is a base angle, then, THe vertex angle, would be .
 expressions/350160: 7x^3+10= x=-41 solutions Answer 250305 by Fombitz(13828)   on 2010-09-30 13:00:03 (Show Source): You can put this solution on YOUR website!When ,
 Quadratic_Equations/350196: i have been working on this problem for an hour and cannot seem to figure it out. Thank you ∛(y^10 )×∛(y^11 ) multipy and simplify1 solutions Answer 250303 by Fombitz(13828)   on 2010-09-30 12:57:57 (Show Source): You can put this solution on YOUR website!I'm not sure what symbols are in the boxes in front of and ?? But
 Linear-systems/350151: Solve the system by substitution, elimination, or graphing: x-3y=17 5x-15y=811 solutions Answer 250276 by Fombitz(13828)   on 2010-09-30 11:20:17 (Show Source): You can put this solution on YOUR website!If you multiply the first equation by 5, Same left hand side, different right hand side comapred to the second equation. These two lines are parallel, there is no solution.
 Linear_Algebra/350148: The slope of a line is 12 and the point (1, 5) is on the line. Express the line in slope-intercept form.1 solutions Answer 250275 by Fombitz(13828)   on 2010-09-30 11:15:27 (Show Source): You can put this solution on YOUR website!Start with the point-slope form, Then convert to slope-interept form,
 Travel_Word_Problems/350150: a train goes 60 mph how fast will it travel in 20 minutes1 solutions Answer 250273 by Fombitz(13828)   on 2010-09-30 11:11:38 (Show Source): You can put this solution on YOUR website!Rate*Time=Distance . . . minutes is of an hour. . . miles
 Quadratic_Equations/350047: please solve this because i need it: ((x-1)/(x))^2-(x-1)/(x)-2=0. Thanks!1 solutions Answer 250268 by Fombitz(13828)   on 2010-09-30 10:54:47 (Show Source): You can put this solution on YOUR website!Substitute, let Then, Two solutions: . . .
 Proportions/350004: 2X2+1+XY+X2+2XY+51 solutions Answer 250265 by Fombitz(13828)   on 2010-09-30 10:51:12 (Show Source): You can put this solution on YOUR website!What's the question?
 Quadratic_Equations/350143: 3x^2-5x+8 use x=-3 I tried this question 3(-3)^2-5(-3)+8 3(9)+15+8 27+15+8=50 is 50 the answer?1 solutions Answer 250264 by Fombitz(13828)   on 2010-09-30 10:50:37 (Show Source): You can put this solution on YOUR website!Yes, well done.
 Human-and-algebraic-language/350145: A rope is 54 in. in length and must be cut into two pieces. If one piece must be twice as long as the other, find the length of each piece x+x+2=54 2x+2=54 -2 -2 2x=54 2x 2 x=27 x+2 27+2 291 solutions Answer 250263 by Fombitz(13828)   on 2010-09-30 10:49:38 (Show Source): You can put this solution on YOUR website!No, the problem you solved is if one piece is 2 inches longer than the other. If one piece is x, the other is 2x.
 Quadratic_Equations/350141: (p^3-2p)/(p^2-81)1 solutions Answer 250258 by Fombitz(13828)   on 2010-09-30 10:38:46 (Show Source):
 Coordinate-system/350007: Use your graphing calculator to approximate the point at which the function f(x) = 2x^4 - 4x - 2 has a local minimum value. Give both coordinates rounded to two decimal places.1 solutions Answer 250257 by Fombitz(13828)   on 2010-09-30 10:37:54 (Show Source): You can put this solution on YOUR website! . . . . . The minimum occurs at . . . (,)
 Quadratic_Equations/350140: (5z-15)/49÷(z-3)/35z simplify answer, use integers or fractions1 solutions Answer 250255 by Fombitz(13828)   on 2010-09-30 10:31:21 (Show Source): You can put this solution on YOUR website! . . . . . .
 Polynomials-and-rational-expressions/350045: Multiply and simplify completely, including the elimination of all negative exponents (2x^8/3y^3)^4 / (3^2y^9/2^3x^-8) I don't understand how to combine the exponents here 1 solutions Answer 250254 by Fombitz(13828)   on 2010-09-30 10:28:05 (Show Source): You can put this solution on YOUR website!Remember the laws of exponents, . . . Also, dividing by a fraction is equivalent to multiplying by its reciprocal. . . . . . . . . . . . . . . .
 Rational-functions/350032: If x=.2 when y=1485 and y varies inversely as x, find y when x=27.1 solutions Answer 250250 by Fombitz(13828)   on 2010-09-30 10:21:11 (Show Source): You can put this solution on YOUR website! or
 Quadratic_Equations/350138: x+5=√(9x+81) find x 1 solutions Answer 250249 by Fombitz(13828)   on 2010-09-30 10:19:20 (Show Source): You can put this solution on YOUR website!Square both sides, Two solutions: . . .
 Number-Line/350025: how to write that 4 is less than 1 in a number line1 solutions Answer 250248 by Fombitz(13828)   on 2010-09-30 10:17:39 (Show Source): You can put this solution on YOUR website!You can't write it on a number line. Anyways, 4 is not less than 1. 4 is greater than 1 as shown on the number line. Values to the left of a number are smaller than the number on a number line.