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# Recent problems solved by 'Alan3354'

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 Polynomials-and-rational-expressions/703945: How do I subtract (7a^3 +a-4) -(9-4a^3-2a^2)1 solutions Answer 433835 by Alan3354(30993)   on 2013-01-19 18:44:20 (Show Source): You can put this solution on YOUR website!How do I subtract (7a^3 +a-4) -(9-4a^3-2a^2) --------------------- Change the signs (7a^3 +a-4) -(9-4a^3-2a^2) = (7a^3 +a-4) -9 + 4a^3 + 2a^2 Combine like terms, eg, 7a^3 + 4a^3 = 11a^3
 Angles/703968: m1 solutions Answer 433833 by Alan3354(30993)   on 2013-01-19 18:36:53 (Show Source): You can put this solution on YOUR website!m ------------- m < ijk=57 and m < ijl=20 find m < ljk ------------- How are these angles related, if they are.
 Geometry_Word_Problems/703982: three interior angles of a convex heptagon measure 125 degrees and two of the interior angles measure 143 degrees what are the other two interior angle measure in the heptagon?1 solutions Answer 433832 by Alan3354(30993)   on 2013-01-19 18:34:55 (Show Source): You can put this solution on YOUR website!three interior angles of a convex heptagon measure 125 degrees and two of the interior angles measure 143 degrees what are the other two interior angle measure in the heptagon? ---------------- A heptagon has 7 sides and angles. The sum of the interior angles is 900 degrees.
 Travel_Word_Problems/703980: a small plane traveled the 1800 km distance between two islands in 3 hours with the wind. the return trip against the wind took 6 hours . find the rate of the plane in still air and the rate of the wind1 solutions Answer 433829 by Alan3354(30993)   on 2013-01-19 18:18:49 (Show Source): You can put this solution on YOUR website!a small plane traveled the 1800 km distance between two islands in 3 hours with the wind. the return trip against the wind took 6 hours . find the rate of the plane in still air and the rate of the wind -------------- Find the 2 groundspeeds using r = d/t -------------- The plane's airspeed is the average of the 2. The windspeed is the difference between airspeed and groundspeed. ----------- "the rate of the plane in still air" is a moronic statement.
 Graphs/703971: how would i graph this inequality y-4 1 solutions Answer 433826 by Alan3354(30993)   on 2013-01-19 17:18:01 (Show Source): You can put this solution on YOUR website!how would i graph this inequality y-4 ------- y-4 Add 4 y < x-2 Graph y = x-2 It's a straight line, so you need 2 points. y = x-2 is a line that goes from lower left to upper right. y < x-2 is the area below the line. The line is not included.
 Exponents/703970: It's a formula for Present Value Formula. I am trying to understand the operation of an exponent. my problem is this 50000(1.05)^-12 I am confused as to how the calculator got the answer of 0.556837418177559 I was wondering if there is a way for my to do this problem (1.05)^-12 (the numbers will change but this is the first number I came up with) if I have no calculator available. As for the completion of my problem. In the end I need a higher interest in order to save the amount that I wanted but even though the interest changes, I would like to know if finding the numbers are possible without a calculator. 1 solutions Answer 433825 by Alan3354(30993)   on 2013-01-19 17:13:27 (Show Source): You can put this solution on YOUR website!It's a formula for Present Value Formula. I am trying to understand the operation of an exponent. my problem is this 50000(1.05)^-12 I am confused as to how the calculator got the answer of 0.556837418177559 I was wondering if there is a way for my to do this problem (1.05)^-12 (the numbers will change but this is the first number I came up with) if I have no calculator available. As for the completion of my problem. In the end I need a higher interest in order to save the amount that I wanted but even though the interest changes, I would like to know if finding the numbers are possible without a calculator. ------------- You can do it without a calculator, obviously people did before the advent of calculators. Chances are you'll get tired of it before you're done.
 Polynomials-and-rational-expressions/703927: is 3x squared minus 3x squared x squared or zero1 solutions Answer 433823 by Alan3354(30993)   on 2013-01-19 16:52:08 (Show Source): You can put this solution on YOUR website!is 3x squared minus 3x squared x squared or zero ------------
 Linear-equations/703807: Trying to change the following equation into slope intercept form. 3/4x-3y=-5 I first moved the 3/4 x to the other side to get -3y=-3/4x-5 I am just wondering how you then get the y by itself? I would divide by -3 but how do I divide -3/4 by -3? Or, do I need to get rid of the fraction to start off? If so, how do I do that? Thanks1 solutions Answer 433711 by Alan3354(30993)   on 2013-01-18 20:08:10 (Show Source): You can put this solution on YOUR website!Trying to change the following equation into slope intercept form. 3/4x-3y=-5 I first moved the 3/4 x to the other side to get -3y=-3/4x-5 I am just wondering how you then get the y by itself? I would divide by -3 but how do I divide -3/4 by -3? -------------- (-3/4)/(-3) = 1/4 ---- --> y = (1/4)x + 5/3
 Exponents-negative-and-fractional/703776: simplify. 7m zero power when m=1.71 solutions Answer 433688 by Alan3354(30993)   on 2013-01-18 18:54:51 (Show Source): You can put this solution on YOUR website!simplify. 7m zero power when m=1.7 ------------ m^0 = 1 --> 7*1 = 7
 Exponents-negative-and-fractional/703780: Express using positive exponents. Then if possible, simplify r over v to the power of -51 solutions Answer 433687 by Alan3354(30993)   on 2013-01-18 18:50:57 (Show Source): You can put this solution on YOUR website!Express using positive exponents. Then if possible, simplify r over v to the power of -5 ---------- Multiply NUM and DEN by v^5 = =
 Exponents/703773: Explain why scientific notation is helpful for writing some numbers.1 solutions Answer 433686 by Alan3354(30993)   on 2013-01-18 18:47:02 (Show Source): You can put this solution on YOUR website! Explain why scientific notation is helpful for writing some numbers. ----------- It saves time and space and reduces the chance of errors. --- eg, 0.0000000004 = 4E-10 or (4*10^-10) 300000000 = 3E8
 test/703779: What Is 10^(-1) 1 solutions Answer 433685 by Alan3354(30993)   on 2013-01-18 18:44:29 (Show Source): You can put this solution on YOUR website!What Is 10^(-1) -------- = 1/10
 Linear_Equations_And_Systems_Word_Problems/703758: If X people can do a job in D days, how long would it take Y people to do the same job1 solutions Answer 433680 by Alan3354(30993)   on 2013-01-18 18:25:00 (Show Source): You can put this solution on YOUR website!If X people can do a job in D days, how long would it take Y people to do the same job ------------ X*D/Y days
 Reduction-of-unit-multipliers/703771: Can you help me by giving me problems 1 solutions Answer 433679 by Alan3354(30993)   on 2013-01-18 18:23:46 (Show Source): You can put this solution on YOUR website!Can you help me by giving me problems --------------- There are 1000's of solved problems on this site. Start there.
 Mixture_Word_Problems/703750: If you mix a half gallon of 95% alcohol with a half gallon of 15% alcohol what is the alcohol % of the mix end up being. Thanks David1 solutions Answer 433663 by Alan3354(30993)   on 2013-01-18 16:49:38 (Show Source): You can put this solution on YOUR website!If you mix a half gallon of 95% alcohol with a half gallon of 15% alcohol what is the alcohol % of the mix end up being. ------------ The average (95 + 15)/2 = 55%
 test/703747: Algebra 1 solutions Answer 433660 by Alan3354(30993)   on 2013-01-18 16:31:11 (Show Source): You can put this solution on YOUR website!Algebra --------- Sounds familiar.
 test/703686: Simplify (3x^2y)^31 solutions Answer 433657 by Alan3354(30993)   on 2013-01-18 16:19:55 (Show Source): You can put this solution on YOUR website!Simplify (3x^2y)^3 -------------- = Is that simpler?
 Proportions/703740: If the perimeter of a rectangle is 54cm then how can I find the length and width?1 solutions Answer 433656 by Alan3354(30993)   on 2013-01-18 15:59:11 (Show Source): You can put this solution on YOUR website!If the perimeter of a rectangle is 54cm then how can I find the length and width? --------- P = 2W + 2L = 54 L + W = 27 L & W can be any combination L>0 and W>0 whose sum = 27
 Triangles/703673: Tell wether the proportion is correct. d/f=g/e1 solutions Answer 433644 by Alan3354(30993)   on 2013-01-18 14:32:39 (Show Source): You can put this solution on YOUR website!Tell wether the proportion is correct. d/f=g/e --------------- What is it related to?
 Trigonometry-basics/703703: How do I solve (1/2, -sqrt3/2) if t is a real number and P=(x,y) is the point on the unit circle that corresponds to t.1 solutions Answer 433636 by Alan3354(30993)   on 2013-01-18 13:45:45 (Show Source): You can put this solution on YOUR website!How do I solve (1/2, -sqrt3/2) if t is a real number and P=(x,y) is the point on the unit circle that corresponds to t. ----------------- Solve for what? How is t related to the point?
 sets-and-operations/703680: what are possible subset for I={8,9}?1 solutions Answer 433625 by Alan3354(30993)   on 2013-01-18 12:26:38 (Show Source): You can put this solution on YOUR website!what are possible subset for I={8,9}? ------- {} {8} {9} {8,9}
 Linear-equations/703684: how can I find the missing value in a graph 1 solutions Answer 433624 by Alan3354(30993)   on 2013-01-18 12:25:43 (Show Source): You can put this solution on YOUR website!how can I find the missing value in a graph ------------- A graph is a line or a curve. How would a value be missing?
 Circles/703636: find the equation of the circle w/center (-4,-5) and tangent to the line 2x+7y-10=01 solutions Answer 433602 by Alan3354(30993)   on 2013-01-18 10:26:30 (Show Source): You can put this solution on YOUR website!find the equation of the circle w/center (-4,-5) and tangent to the line 2x+7y-10=0 ---------------- Find the equation of the line thru (-4,-5) and perpendicular to 2x+7y-10=0 ------- The intersection of the 2 lines is the tangent point. The distance from (-4,-5) to the tangent point is the radius. ----- (x+4)^2 + (y+5)^2 = r^2 is the circle.
 test/703568: Price:\$95:00 Sales tax rate: 4%1 solutions Answer 433559 by Alan3354(30993)   on 2013-01-17 22:00:54 (Show Source): You can put this solution on YOUR website!Price:\$95:00 Sales tax rate: 4% ---- Do you have a question?
 �t�e�s�t/703571: i don't get how to do this problem my math teacher hasn't even explained how to do it can you help? the problem is: 16x - 4x = 481 solutions Answer 433558 by Alan3354(30993)   on 2013-01-17 21:59:48 (Show Source): You can put this solution on YOUR website!16x - 4x = 48 Combine the x terms 12x = 48 Divide by 12 x = 4
 Equations/703527: how can i get an answer to: Use whatever information you are ginven to write the wquation of a lne in slope intercept form. y=mx+b 1 solutions Answer 433550 by Alan3354(30993)   on 2013-01-17 21:11:55 (Show Source): You can put this solution on YOUR website!how can i get an answer to: Use whatever information you are ginven to write the wquation of a lne in slope intercept form. y=mx+b -------------------- y = mx + b is the slope-intercept form m = slope b = y-intercept
 Travel_Word_Problems/703533: The 4200 km trip from New York to San Fransico takes 7h flying against the wind but on 6h returning. find the speed of the plane in still air and the wind speed.please show steps thank you for your help1 solutions Answer 433545 by Alan3354(30993)   on 2013-01-17 20:55:11 (Show Source): You can put this solution on YOUR website!duplicate
 Travel_Word_Problems/703543: the 4200 km trip from new york to sanfransico takes 7 h flying against the wind but only 6h returning find the speed of the plane in stil air and the wind speed. Please show steps. thank you1 solutions Answer 433543 by Alan3354(30993)   on 2013-01-17 20:53:22 (Show Source): You can put this solution on YOUR website!the 4200 km trip from new york to sanfransico takes 7 h flying against the wind but only 6h returning find the speed of the plane in stil air and the wind speed. --------- Use d = r*t --> r = d/t to find the 2 groundspeeds The plane's airspeed is the average of the 2 groundspeeds. The windspeed is the difference between airspeed and groundspeed.
 Miscellaneous_Word_Problems/703542: CARRIE BOUGHT 4 BAGS OF BIRDSEED.THERE ARE 25 POUNDS OF BIRDSEED IN EACH BAG.EACH BAG COST 8\$.1 solutions Answer 433542 by Alan3354(30993)   on 2013-01-17 20:51:19 (Show Source): You can put this solution on YOUR website!CARRIE BOUGHT 4 BAGS OF BIRDSEED.THERE ARE 25 POUNDS OF BIRDSEED IN EACH BAG.EACH BAG COST 8\$. ----------------- And we should care about that? Do you have a question? Try not using all CAPS, too.
 Inequalities/703519: A rectangle is 3 times longer than it is wide. The perimeter is 44cm. Find the dimensions of the rectangle.1 solutions Answer 433534 by Alan3354(30993)   on 2013-01-17 20:24:09 (Show Source): You can put this solution on YOUR website!A rectangle is 3 times longer than it is wide. The perimeter is 44cm. Find the dimensions of the rectangle. ----------------- L = 4W 2L + 2W = 44 L + W = 22 4W + W = 22 5W = 22 W = 4.4 cm L = 17.6 cm ================================ PS 3 times longer is 4 times as long, not 3 times as long.
 test/703510: I need help with equations1 solutions Answer 433527 by Alan3354(30993)   on 2013-01-17 20:04:46 (Show Source): You can put this solution on YOUR website!I need help with equations ---------- There are a lot of different types. Post an example.