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# Recent problems solved by 'Fombitz'

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 Quadratic_Equations/341595: I need help solving x^2+20x=6 I know the formula should be x^2+bx but I need help understanding how to complete the square.1 solutions Answer 244626 by Fombitz(13828)   on 2010-09-11 08:46:08 (Show Source): You can put this solution on YOUR website! To complete the square, take of the x-coefficient(), square it, and add it to both sides.
 Linear-equations/341585: write equations for the vertical and horizontal lines passing through the point (-5,)1 solutions Answer 244625 by Fombitz(13828)   on 2010-09-11 08:43:27 (Show Source): You can put this solution on YOUR website!Your ordered pair is incomplete. The vertical line would be . But without the y-coordinate, it can't be determined. If the ordered pair was (,), then the horizontal line would be
 Geometry_Word_Problems/341581: the area of a rectangle is 991 cm2 . if 991 is a prime number, what are the whole number dimensions of the rectangle. explain with reasoning1 solutions Answer 244624 by Fombitz(13828)   on 2010-09-11 08:41:49 (Show Source): You can put this solution on YOUR website!Prime numbers only have factors of 1 and themselves. So a rectangle with an area of 991 can only be either 1 cm wide by 991 cm long or 991 cm wide by 1 cm long.
 Graphs/341574: 2x -3 > 3x -11 solutions Answer 244623 by Fombitz(13828)   on 2010-09-11 08:40:24 (Show Source):
 Graphs/341569: 2x -3 > 231 solutions Answer 244622 by Fombitz(13828)   on 2010-09-11 08:37:48 (Show Source):
 Reduction-of-unit-multipliers/341567: 2.5gm=xmg1 solutions Answer 244621 by Fombitz(13828)   on 2010-09-11 08:36:54 (Show Source): You can put this solution on YOUR website!There are 1000mg/1g. 2.5g(1000mg/1g)=2500mg
 Systems-of-equations/341556: for equation y=2x-4 select order of pairs that are solutions: 0,-4 -1,-6 2,3 -4,01 solutions Answer 244619 by Fombitz(13828)   on 2010-09-11 08:35:35 (Show Source): You can put this solution on YOUR website!Substitute values for x and y. I'll do one you do the rest. True, so (,) is a solution. Now do the rest of the ordered pairs in the same way.
 Linear-systems/341064: I am not sure what to do on this one 3(x-0.87)-2x=4.981 solutions Answer 244527 by Fombitz(13828)   on 2010-09-10 16:07:32 (Show Source): You can put this solution on YOUR website!Distribute the . Take it from there and solve for .
 Geometry_Word_Problems/340808: I need help w/solving 2x-5=3x ____ 41 solutions Answer 244525 by Fombitz(13828)   on 2010-09-10 16:06:04 (Show Source): You can put this solution on YOUR website! Now solve for .
 Trigonometry-basics/340711: The accepted density for mercury is 13.6 g/mL. Calculate the percent error for each of these measurements. (c) 13.9 g/mL (d) 13.4 g/mL1 solutions Answer 244524 by Fombitz(13828)   on 2010-09-10 16:05:07 (Show Source): You can put this solution on YOUR website!% Error=(Measured-Actual)/Actual x 100 . . . c) % . . . Do the next one, the same way.
 Linear-equations/341049: Find m and b and graph. y=4-3x1 solutions Answer 244522 by Fombitz(13828)   on 2010-09-10 16:02:58 (Show Source): You can put this solution on YOUR website!The line is in slope-intercept form, . . .
 real-numbers/341052: Is 7.6 Rational or Irrational?1 solutions Answer 244521 by Fombitz(13828)   on 2010-09-10 15:57:54 (Show Source): You can put this solution on YOUR website!Rational, it's the ratio of the two integers 76 and 10.
 Functions/340858: Directions: For each function f, construct and simplify the difference quotient. f(x)=3x-5 - I have no problem with setting up the problem, but I have the most trouble with solving with fractions. 1 solutions Answer 244520 by Fombitz(13828)   on 2010-09-10 15:57:06 (Show Source): You can put this solution on YOUR website!Shouldn't be a problem here. . . . . Now divide both sides by .
 Linear-systems/340960: for the following equation, state the value of the discriminant and then describe the nature of the solutions. -3x^2-9x-5=0 The equation has one or two real solutions?1 solutions Answer 244519 by Fombitz(13828)   on 2010-09-10 15:54:36 (Show Source): You can put this solution on YOUR website! . . . Since there are two unique irrational solutions.
 Polynomials-and-rational-expressions/341388: I really need help with rational functions! Please help me with the following: I need to find the zeroes, poles and asymptotes, then sketch x(x-1)(x-5)/(x+1)(x-3)(x-4) Thank you very much!1 solutions Answer 244518 by Fombitz(13828)   on 2010-09-10 15:49:59 (Show Source): You can put this solution on YOUR website!Zeros make the numerator equal zero. Three solutions: . . . . . . . . . Vertical asymptotes occur when the denominator equals zero. Three solutions: . . . . . . . . .
 Travel_Word_Problems/340655: How long does it take an automobile traveling at 63.2 km/h to become even with a car that is traveling in another lane at 49.2 km/h if the cars' bumpers are initially 137m apart? Answer your units in s. 1 solutions Answer 244517 by Fombitz(13828)   on 2010-09-10 15:37:36 (Show Source): You can put this solution on YOUR website!Rate*Time=Distance . . . Convert meters to km. Find when hrs. There are seconds in hour. sec.
 Quadratic-relations-and-conic-sections/341469: Where does the parabola with the vertex (-4,5)and y-intercept -27 cross the x-axis?1 solutions Answer 244516 by Fombitz(13828)   on 2010-09-10 15:34:11 (Show Source): You can put this solution on YOUR website!In vertex form, When . . . . . .
 Average/340654: You have \$100 and want to buy 100 items priced at \$10, \$3 and .50. What is the combination of items purchased when you must buy at least 1 of each?1 solutions Answer 244515 by Fombitz(13828)   on 2010-09-10 15:26:25 (Show Source): You can put this solution on YOUR website!Let be the number of \$10 parts, \$3 parts, \$0.50 parts. 1. . . . 2. From eq. 1, Substitute into eq. 2, The equation can only be satisfied when is a multiple of . In becomes a multiple of when . Then
 Angles/340644: A supplement of an angle is six times as large as a complement of the angle. Find the measures of the angle, its supplement, and its complement.1 solutions Answer 244514 by Fombitz(13828)   on 2010-09-10 15:13:40 (Show Source): You can put this solution on YOUR website!1. 2. 3. Subtract eq. 1 from eq. 2, Substitute from eq. 3, degrees Then degrees . . . degrees
 Equations/340645: How do you solve problems like 4/x-3 = 8/x Could you also show me the work so I know how to do other problems similar to this?1 solutions Answer 244513 by Fombitz(13828)   on 2010-09-10 15:10:43 (Show Source): You can put this solution on YOUR website!Multiply both sides by the product of the denominators. In this case, ,
 Travel_Word_Problems/340658: Hans and Heidi departed in opposite directions from the bus stop. Hans left at 1 p.m. and Heidi left at 2 p.m. Hans drove his bus 50 miles per hour and Heidi drove hers at 60 miles per hour. At what time were the two drivers 270 miles apart?1 solutions Answer 244512 by Fombitz(13828)   on 2010-09-10 15:08:59 (Show Source): You can put this solution on YOUR website! Rate*Time=Distance . . . During that hour, Hans drove 50 miles. . . . . . . Find when , hrs. They will meet 5 hours after Heidi left.
 Linear-equations/341466: a line passes through the point (-4,-3 and a slope of 3 write the equation for this line1 solutions Answer 244511 by Fombitz(13828)   on 2010-09-10 15:06:19 (Show Source): You can put this solution on YOUR website!Use the point slope form of a line,
 Equations/341468: 750=2x+4y what are the values of x and y?1 solutions Answer 244510 by Fombitz(13828)   on 2010-09-10 15:04:59 (Show Source): You can put this solution on YOUR website!To solve for 2 variables, you need 2 independent equations. You only have 1. The best you can do is solve for in terms of or in terms of .
 Money_Word_Problems/340652: an inheretance earned 6.1%interest compounded continously. after 5 years he had 51426.94. What was the original inheretance?1 solutions Answer 244509 by Fombitz(13828)   on 2010-09-10 15:03:45 (Show Source):
 Numbers_Word_Problems/340649: find three consecutive odd integers such that sum of the smallest and 4 times the largest is 611 solutions Answer 244508 by Fombitz(13828)   on 2010-09-10 15:00:16 (Show Source): You can put this solution on YOUR website!The three integers are, . . . The integers are ,, and .
 Trigonometry-basics/340968: Find the right part of the identity. CSC B/Sec B =1 solutions Answer 244507 by Fombitz(13828)   on 2010-09-10 14:55:41 (Show Source): You can put this solution on YOUR website! . . . .
 Equations/341465: 70x^2y^4/4x^3y I have to simplify this rational equation. This is what I have so far: = 7*10*x*x*y*y*y*y/1*4*x*x*x*y = 7*10*y*y*y/1*4*x*y = 70y^3/4xy Does this look right?1 solutions Answer 244503 by Fombitz(13828)   on 2010-09-10 14:52:35 (Show Source): You can put this solution on YOUR website!It's easier to use the laws of exponents rather than expand the expressions. Further simplification is possible in your answer. . . .
 Numbers_Word_Problems/341018: The sum of two numbers is 70. Their quotient is 13. what are the two numbers?1 solutions Answer 244502 by Fombitz(13828)   on 2010-09-10 14:49:38 (Show Source): You can put this solution on YOUR website!Let the two numbers be A and B. 1. 2. From eq. 2, Substitute into eq. 1,
 Length-and-distance/341390: what is the distance between a & b A(2,2) B(5,5)1 solutions Answer 244491 by Fombitz(13828)   on 2010-09-10 13:41:41 (Show Source): You can put this solution on YOUR website!Use the distance formula,
 Expressions-with-variables/341451: Factor Completely; 3x^8-15x7^15+15x^61 solutions Answer 244490 by Fombitz(13828)   on 2010-09-10 13:39:50 (Show Source): You can put this solution on YOUR website!Check this term, 15x7^15.
 Mixture_Word_Problems/341445: how many liters of 25% alcohol must be mixed with 40 liters of a 35 % alcohol solution?1 solutions Answer 244489 by Fombitz(13828)   on 2010-09-10 13:39:05 (Show Source):