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Fombitz answered: 13805 problems
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Graphs/354890: how do you sketch this piece equation in a graph? ---(1/3x-2, 3<3 y={ ---(x-2, x>and equal to 3 1 solutions Answer 253520 by Fombitz(13828)   on 2010-10-11 19:55:11 (Show Source): You can put this solution on YOUR website! Choose your range. How about (,). Solve for , left, right, . = left= right= = Now plot the points and connect them with straight lines. . . .

logarithm/354826: I need help, step by step on how to solve ln (x +7) + ln (x + 3) = ln 77 1 solutions Answer 253515 by Fombitz(13828)   on 2010-10-11 19:41:06 (Show Source): You can put this solution on YOUR website! and . . . However since is undefined, only is a valid solution.

Exponents/354881: Simplify the expression: (-z)^3(3z^4) 1 solutions Answer 253511 by Fombitz(13828)   on 2010-10-11 19:35:56 (Show Source): You can put this solution on YOUR website!

Linear_Equations_And_Systems_Word_Problems/354876: A dehydrated patient needs a 6.4% saline IV. Unfortunately, the hospital only has bags of 6% and 8% saline solutions. How many liters of each of these solutions should be mixed together to yield 1 liter of the desired concentration? 1 solutions Answer 253510 by Fombitz(13828)   on 2010-10-11 19:34:58 (Show Source): You can put this solution on YOUR website! Let be the amount of 6% solution, the amount of 8% solution. 1. . . . 2. . . . Multiply eq. 1 by -3 and add to eq. 2 to eliminate . or ml . . . liter or ml

Miscellaneous_Word_Problems/354828: Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 1/2 hours. How quickly can all three fill the pool together? 1 solutions Answer 253508 by Fombitz(13828)   on 2010-10-11 19:28:00 (Show Source): You can put this solution on YOUR website! Rate*Time=Output . . Let be the output required to fill the pool. Find each person's rate. . . Jim: . . . Sue: . . . Tony: . . . Their output all together, Substituting, minutes.

Miscellaneous_Word_Problems/354822: The average of three numbers is V. If one of the numbers is Z and another is Y, what is the remaining number? 1 solutions Answer 253504 by Fombitz(13828)   on 2010-10-11 19:21:28 (Show Source): You can put this solution on YOUR website! Let the remaining number be R.

Probability-and-statistics/354832: 256 is the answer but the base is 4 1 solutions Answer 253503 by Fombitz(13828)   on 2010-10-11 19:20:08 (Show Source): You can put this solution on YOUR website!

Graphs/354840: Graph the solution set. 2x+5y ≥ 10 1 solutions Answer 253502 by Fombitz(13828)   on 2010-10-11 19:19:31 (Show Source): You can put this solution on YOUR website! Solved by pluggable solver: Plot Any Inequality Graphing function :

Angles/354818: ray BD is the bisector of angle ABC. If measure angle ABD = 2x+14 and measure angle CBD = 5x-10, what is the measure of angle ABD? 1 solutions Answer 253501 by Fombitz(13828)   on 2010-10-11 19:18:25 (Show Source): You can put this solution on YOUR website! Since the angle is bisected. . . .

Equations/354872: (2/5) x G=-14 what is the value of g 1 solutions Answer 253500 by Fombitz(13828)   on 2010-10-11 19:16:13 (Show Source): You can put this solution on YOUR website! Mutliply both sides by the multiplicative inverse of (2/5) or (5/2).

Linear-systems/354850: solve the system using any algebraic method.. x+y=2 3x-2y=6 1 solutions Answer 253499 by Fombitz(13828)   on 2010-10-11 19:15:33 (Show Source): You can put this solution on YOUR website! Multiply eq. 1 by 2 and add the equations together to eliminate . Now use either equation to solve for

Equations/354858: (-2,6),m= -1/3 graph, how to solve it 1 solutions Answer 253496 by Fombitz(13828)   on 2010-10-11 19:08:52 (Show Source): You can put this solution on YOUR website! Use the slope, which is the change in y divided by the change in x. Starting from (,). If you move in the x, then using the slope you should move in the y. : : . . (,) is another point on the graph. Plot the two points and connect them with the line. . . .

Triangles/354009: determine whether the 3 points given could be the vertices of a triangle.show why or why not. s(6,5) p(-8,3) r(12,-1) 1 solutions Answer 253076 by Fombitz(13828)   on 2010-10-09 23:58:07 (Show Source): You can put this solution on YOUR website!

Linear-equations/354054: graph the function f(x)=-5x 1 solutions Answer 253074 by Fombitz(13828)   on 2010-10-09 23:54:23 (Show Source): You can put this solution on YOUR website!

Functions/353970: for f(x)= x^2-64 and g(x)= 2x+3, what is the domain of f-g? 1 solutions Answer 253073 by Fombitz(13828)   on 2010-10-09 23:53:21 (Show Source): You can put this solution on YOUR website! There are no restrictions on the domain. Domain:(,)

Functions/353689: (g o f)(x):f(x)=-3x+2,g(x)=5X+7 i needto find the indicated composite for the pair of functions....really appreciate your time and help! 1 solutions Answer 252890 by Fombitz(13828)   on 2010-10-09 00:17:11 (Show Source): You can put this solution on YOUR website! . . .

Rational-functions/353701: 2/ 4-x + 5/x-4 1 solutions Answer 252889 by Fombitz(13828)   on 2010-10-09 00:14:49 (Show Source): You can put this solution on YOUR website!

Travel_Word_Problems/353774: Two men start driving toward each other at the same time from points 816 km apart. If they travel at 64 kilometers per hour and 72 kilometers per hour, respectively, in how many hours will they meet? 1 solutions Answer 252888 by Fombitz(13828)   on 2010-10-09 00:12:03 (Show Source): You can put this solution on YOUR website! Rate*Time=Distance . . . hrs.

Travel_Word_Problems/353776: Carlo starts out in his car traveling at 48 kilometers per hour. Two hours later, Paolo stars out from the same place at 60 kilometers per hour to overtake Carlo. In how many hours will Paulo overtake Carlo? 1 solutions Answer 252887 by Fombitz(13828)   on 2010-10-09 00:09:52 (Show Source): You can put this solution on YOUR website! Rate*Time=Distance . . . During the two hours, Carlo travels km. Find when hrs.

Unit_Conversion_Word_Problems/353727: What does a giant sequoia tree weigh? Model the tree as a (very elongated) cone. Assume that the tree is 360 ft high, has a circumference of 37 ft at the base, and that the density of the wood is 31 lb/ft3. (Round your answer to the nearest lb. The volume of a cone of height h and radius r is1/3 πr2h. 1 solutions Answer 252886 by Fombitz(13828)   on 2010-10-09 00:07:14 (Show Source): You can put this solution on YOUR website! ft . . . Complete the calculation to get the weight in lbs.

Probability-and-statistics/353766: one of the factors fo 48 is chosen at random. what is the probability that the chosen factor is not a multiple of 4? 1 solutions Answer 252876 by Fombitz(13828)   on 2010-10-08 22:44:26 (Show Source): You can put this solution on YOUR website! Let's look at all of the factors of 1,48 2,24 3,16 4,12 6,8 Of those 10, 1,2,3, and 6 are not multiples of . P=

Mixture_Word_Problems/353765: .............Lead....Zink....Copper Alloy A..40%...30%...30% Alloy B..20%...30%...50% Alloy C..........10%...90% How many grams of each alloys A, B, and C must be mixed to get 325g of an alloy that is 15.2% lead, 37.2% zink, and 47.6% copper? I've tried this using the Matrix, and the inverse Matrix, and keep coming up with negitives on some alloys. Thanks for your help. Neil 1 solutions Answer 252874 by Fombitz(13828)   on 2010-10-08 22:40:16 (Show Source): You can put this solution on YOUR website! Let be the amount of alloy A, alloy B, alloy C. . . . Lead: Zinc: Copper: . . . Using matrix inversion, . . . . . I get the same answer. Something is up with the problem setup.

Probability-and-statistics/353733: Two students take a college entrance exam known to have a normal distribution of scores. The students receive raw scores of 63 and 93, which correspond to z scores (often called the standardized scores) of –1 and 1.5, respectively. Find the mean and standard deviation of the distribution of raw exam scores. 1 solutions Answer 252869 by Fombitz(13828)   on 2010-10-08 22:09:01 (Show Source): You can put this solution on YOUR website! . . 1. 2. Subtract eq. 1 from eq. 2, Then use either equation to solve for .

Probability-and-statistics/353753: The lifetime of a color television is normally distributed with a mean of 7.8 years and a standard deviation of 3.1 years. What is the probability that a TV will last more than 7.8 years? What is the probability that a TV will last more than 10 years? How many years should the warranty period be if they want to replace 1% of the TVs? 1 solutions Answer 252866 by Fombitz(13828)   on 2010-10-08 22:00:43 (Show Source): You can put this solution on YOUR website! DUPLICATE See Question 353660 from Probability-and-statistics

Linear-equations/353759: given the function k described by k(y+11)= 1 solutions Answer 252865 by Fombitz(13828)   on 2010-10-08 21:59:01 (Show Source): You can put this solution on YOUR website! . . . Is that your question??

test/353738: X4 + 9 1 solutions Answer 252864 by Fombitz(13828)   on 2010-10-08 21:57:47 (Show Source): You can put this solution on YOUR website! What's the question?

Probability-and-statistics/353748: --------------- QUESTION FOLLOWS -------------------------- Construct a frequency distrubtion table to organize the following set of data: 109 114 111 109 109 106 110 114 114 112 111 110 114 114 110 113 114 105 107 107 1 solutions Answer 252863 by Fombitz(13828)   on 2010-10-08 21:57:21 (Show Source): You can put this solution on YOUR website! 105:X 106:X 107:XX 108: 109:XXX 110:XXX 111:XX 112:X 113:X 114:XXXXXX

Probability-and-statistics/353756: two cards are randomnly selected from 52 card deck. what is the probability that the draw will yield an ace and a face card 1 solutions Answer 252861 by Fombitz(13828)   on 2010-10-08 21:54:40 (Show Source): You can put this solution on YOUR website! P(ace)= P(face)= P(ace and face)=

Polynomials-and-rational-expressions/353680: two expressions in each problem are..........? 1 solutions Answer 252799 by Fombitz(13828)   on 2010-10-08 16:09:07 (Show Source): You can put this solution on YOUR website! ...better than one??? . . . What's the question?

Travel_Word_Problems/353675: A boat traveled 208 miles downstream and back. The trip downstream took 8 hours. The trip back took 26 hours. What is the speed of the boat in still water? What is the speed of the current? 1 solutions Answer 252798 by Fombitz(13828)   on 2010-10-08 16:02:28 (Show Source): You can put this solution on YOUR website! Rate*Time=Distance . . . Let the boat speed in still water be B, the current speed C. Downstream: 1. . . . Upstream: 2. . . . Add eq. 1 and eq. 2, mph Then use either equation to solve for . mph

Polynomials-and-rational-expressions/353676: subtract polynomials: (-8w^2+4w+3)-(7w^2+3) This is what I have so far....I just need to know if i'm on the right track and if I got the right answer Please help!!!! -8w^2+4w+3 - 7w^2+0w+3 =-15w^2+4w.....is this the right answer??? 1 solutions Answer 252797 by Fombitz(13828)   on 2010-10-08 15:59:08 (Show Source): You can put this solution on YOUR website! Correct, well done!