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# Recent problems solved by 'Alan3354'

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 Inverses/697147: Solve the following algebraically: my work: 2x+2=9x then subtract 2x from both sides 2=7x then divide out 7 to get x alone x=2/71 solutions Answer 429696 by Alan3354(30993)   on 2012-12-28 12:52:25 (Show Source): You can put this solution on YOUR website!Solve the following algebraically: my work: 2x+2=9x then subtract 2x from both sides 2=7x then divide out 7 to get x alone x=2/7 ================== Looks good.
 test/697139: 3x+4y-15=01 solutions Answer 429695 by Alan3354(30993)   on 2012-12-28 12:50:11 (Show Source): You can put this solution on YOUR website!3x+4y-15=0 ------------- Do you have a question?
 Evaluation_Word_Problems/697132: if ab*4=cab,find a,b,c1 solutions Answer 429694 by Alan3354(30993)   on 2012-12-28 12:48:37 (Show Source): You can put this solution on YOUR website!if ab*4=cab,find a,b,c ---------------- c = 4 ---- a & b can be any numbers
 Exponents/697151: Rewrite with only positive exponents my work: I'm not sure if I should leave the on the bottom because the original problem is multiplication and now I changed it to division. 1 solutions Answer 429693 by Alan3354(30993)   on 2012-12-28 12:41:01 (Show Source): You can put this solution on YOUR website!Rewrite with only positive exponents my work: ------------ = =
 Quadratic_Equations/697148: solve by completing the square: My work: then do half of four which is 2, then do 2times 2 and get 4. (x-2)(x-2)=-6 (x-2)=plus or mine x=2 plus or minus 1 solutions Answer 429691 by Alan3354(30993)   on 2012-12-28 12:17:06 (Show Source): You can put this solution on YOUR website!solve by completing the square: My work: then do half of four which is 2, then do 2times 2 and get 4. (x-2)(x-2)=-6 ---- i = sqrt(-1) ========================= (x-2)=plus or mine x=2 plus or minus ***** correct except for the i
 Triangles/697125: if right angle triangle the sides of right angles are 3 and 4 find its hypoteneous?1 solutions Answer 429673 by Alan3354(30993)   on 2012-12-28 09:23:45 (Show Source): You can put this solution on YOUR website!if right angle triangle [sic] the sides of right angles are 3 and 4 find its hypoteneous [sic]? ---------------- if right triangle the sides of right angles are 3 and 4 find its hypotenuse? ------------
 test/697126: 6/2(1+2)1 solutions Answer 429672 by Alan3354(30993)   on 2012-12-28 09:18:29 (Show Source): You can put this solution on YOUR website!6/2(1+2) = 1 still always ------------ Add parentheses for clarification
 Circles/697128: Find the exact area of a shaded region. One angle is 120 degrees 1 solutions Answer 429671 by Alan3354(30993)   on 2012-12-28 09:07:13 (Show Source): You can put this solution on YOUR website!Find the exact area of a shaded region. One angle is 120 degrees ---------------- It's all shade today. It's cloudy.
 Length-and-distance/697129: dy/dx x^2+16/x find the coordinates of their point1 solutions Answer 429670 by Alan3354(30993)   on 2012-12-28 09:06:31 (Show Source): You can put this solution on YOUR website!dy/dx x^2+16/x find the coordinates of their point ------------- What point? Is the numerator x^2 + 16? or 16?
 Polynomials-and-rational-expressions/697097: What is the inverse of f(x)=y^2-(y-1)^21 solutions Answer 429657 by Alan3354(30993)   on 2012-12-27 22:57:28 (Show Source): You can put this solution on YOUR website!What is the inverse of f(x)=y^2-(y-1)^2 ------ No x terms in f(x)
 Linear-systems/697092: 1^5x + 2^5 > -3^5x -1^25 what is the solution set? Could you please explain all steps especially the last step?1 solutions Answer 429656 by Alan3354(30993)   on 2012-12-27 22:48:38 (Show Source): You can put this solution on YOUR website!1^5x + 2^5 > -3^5x -1^25 1 + 32 > -243x - 1 34 > -243x -243x < 34 x > -34/243
 Surface-area/697091: Find the surface area of a sphere with a radius of 12 cm. Approximate as 3.14 and round your answer to the nearest hundredth.1 solutions Answer 429652 by Alan3354(30993)   on 2012-12-27 22:13:10 (Show Source): You can put this solution on YOUR website!Find the surface area of a sphere with a radius of 12 cm. ------------
 Travel_Word_Problems/697055: Two cars leave a gas station and head in the same direction. Car A travels at 35 mph, while car B travels at 45 mph. If Car B leaves two hours after Car A, how many miles from the gas station will Car B catch up to Car A? 1 solutions Answer 429644 by Alan3354(30993)   on 2012-12-27 21:08:45 (Show Source): You can put this solution on YOUR website!Two cars leave a gas station and head in the same direction. Car A travels at 35 mph, while car B travels at 45 mph. If Car B leaves two hours after Car A, how many miles from the gas station will Car B catch up to Car A? -------------- Car A is 70 miles away when Car B starts (35*2) Car B gains on Car A at 10 mi/hr (45-35) 70/10 = 7 hours to overtake Car A 7*45 = 315 miles from the station
 Complex_Numbers/697080: How do I solve this 2-3i/1+i ?1 solutions Answer 429640 by Alan3354(30993)   on 2012-12-27 21:03:34 (Show Source): You can put this solution on YOUR website!How do I solve this 2-3i/1+i ? ------------- Solve for what? Equations are solved. This is not an equation. There's no equal sign.
 Complex_Numbers/697067: 5x^(2)-22+241 solutions Answer 429631 by Alan3354(30993)   on 2012-12-27 19:30:15 (Show Source): You can put this solution on YOUR website!5x^(2)-22+24 = 5x^2 + 2
 Complex_Numbers/697066: 22. What is the binomial of p^4-6p^3+7p^2+7p-31 solutions Answer 429630 by Alan3354(30993)   on 2012-12-27 19:13:59 (Show Source): You can put this solution on YOUR website!What is the binomial of p^4-6p^3+7p^2+7p-3 ----------- That's not a binomial bi means 2. binomials have 2 terms. That has 5
Systems-of-equations/697070: I'm not sure if I am solving this question on systems of equations right. the answer needs to be in simplest a+bi form:

y=x-4
my work:

then I did the quadratic equation: negative B plus or minus divided by 2a
a=2
b=-7
c=11
4ac=22
7 plus or minus divided by 4= 7 plus or minus divided by 4.
Then you break down to and and get 3 .
My final answer was (7 plus or minus 3) divided by 4.
1 solutions

Answer 429629 by Alan3354(30993)   on 2012-12-27 19:06:01 (Show Source):
You can put this solution on YOUR website!
I'm not sure if I am solving this question on systems of equations right. the answer needs to be in simplest a+bi form:

y=x-4
my work:

then I did the quadratic equation: negative B plus or minus divided by 2a
a=2
b=-7
c=11
4ac=22 ************* 4ac = 88
---------
You did it right, except for that.
Go from there.
=======================
 Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc) Quadratic equation (in our case ) has the following solutons: For these solutions to exist, the discriminant should not be a negative number. First, we need to compute the discriminant : . The discriminant -39 is less than zero. That means that there are no solutions among real numbers. If you are a student of advanced school algebra and are aware about imaginary numbers, read on. In the field of imaginary numbers, the square root of -39 is + or - . The solution is , or Here's your graph:

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