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# Recent problems solved by 'Alan3354'

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 Angles/266075: What is the complementary and supplementary angles of 34degrees 42feet 21inches?1 solutions Answer 195509 by Alan3354(30993)   on 2010-02-05 13:41:23 (Show Source): You can put this solution on YOUR website!Angles don't have feet and inches.
 test/266029: the ability of a material to transfer heat or electric current is called?1 solutions Answer 195503 by Alan3354(30993)   on 2010-02-05 11:38:37 (Show Source): You can put this solution on YOUR website!conductivity
 test/266018: a stone falls from a ledge and takes 16 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge?1 solutions Answer 195502 by Alan3354(30993)   on 2010-02-05 11:32:25 (Show Source): You can put this solution on YOUR website!9.8 meters/sec/sec is apx the gravitational acceleration on Earth. Neglecting air friction: s = 4.9t^2 = 4.9*16^2 s = 1254.4 meters -------------------- ~ 4100 feet
 Linear-equations/266011: Find an equation of the line containing the given pair of points: (1/6,-1/3)and (5/6,3) What is the equation of the line?1 solutions Answer 195500 by Alan3354(30993)   on 2010-02-05 11:28:08 (Show Source): You can put this solution on YOUR website!Find an equation of the line containing the given pair of points: (1/6,-1/3)and (5/6,3) --------------- 1st find the slope, m m = diffy/diffx = (-1/3 - 3)/(1/6 - 5) = (-10/3)/(-29/6) m = 20/29 ----------- Use y = mx + b and either point to find b: 3 = (20/29)*(5/6) + b b = 37/87 ------------ y = (20/29)x + 37/87 slope-intercept form 60x - 87y = -37 standard form
 Circles/265961: A circular pool has a radius of 10 meters. Rounded to the nearest square meter, what is the area of the pool? 1 solutions Answer 195498 by Alan3354(30993)   on 2010-02-05 11:22:28 (Show Source): You can put this solution on YOUR website!Area = pi * radius squared A = 100pi A =~ 314 sq meters
 Angles/265981: The measure of one of two complementary angles is 32 degrees. What is the measure of the other angle? 1 solutions Answer 195496 by Alan3354(30993)   on 2010-02-05 11:20:10 (Show Source): You can put this solution on YOUR website!Complementary means they total 90 degs 90 - 32 = 58 degrees. Why did you need help with this?
 Functions/265998: f(x,y)=10x+3y1 solutions Answer 195495 by Alan3354(30993)   on 2010-02-05 11:18:39 (Show Source): You can put this solution on YOUR website!Do you have a question?
 Graphs/266006: can you graph y=3+41 solutions Answer 195493 by Alan3354(30993)   on 2010-02-05 11:17:05 (Show Source): You can put this solution on YOUR website!y=7 is a line parallel to the x-axis thru (0,7) Yes, I can graph it.
 Linear-systems/265977: how do i solve this problem? Carlos has recieved a 9% salary increase. if he now earns \$327 per week, what was his salary before the increase?1 solutions Answer 195491 by Alan3354(30993)   on 2010-02-05 11:11:04 (Show Source): You can put this solution on YOUR website!Carlos has recieved a 9% salary increase. if he now earns \$327 per week, what was his salary before the increase? --------- A 9% increase makes it 109% of the amount before the increase. 109% = 1.09 \$327 = 1.09*Amt Amt = \$327/1.09 = \$300 \$300 was his salary before the increase.
 Money_Word_Problems/266002: simple interest- at what rate of interest will a sum of money double itself in 5 years?1 solutions Answer 195490 by Alan3354(30993)   on 2010-02-05 11:08:06 (Show Source): You can put this solution on YOUR website!Do you mean compound or simple interest? If compound, compounded how often?
 Money_Word_Problems/266001: simple interest- in how many years will a certain sum of money double itself as the interest rate of 10% per annum? 1 solutions Answer 195489 by Alan3354(30993)   on 2010-02-05 11:07:19 (Show Source): You can put this solution on YOUR website!Do you mean compound or simple interest? If compound, compounded how often?
 Linear-equations/265980: What is the slope of the line that passes through (8, 4) and (6, 7) 1 solutions Answer 195488 by Alan3354(30993)   on 2010-02-05 10:58:38 (Show Source): You can put this solution on YOUR website!What is the slope of the line that passes through (8, 4) and (6, 7) ------------ Slope, m = diffy/diffx m = (7-4)/(6-8) m = -3/2
 logarithm/248862: Solve for x to the nearest hundredth: logx+log3=0.7292 please show work. thanks1 solutions Answer 195486 by Alan3354(30993)   on 2010-02-05 10:54:41 (Show Source): You can put this solution on YOUR website! Solve for x to the nearest hundredth: logx+log3=0.7292 --------- log(x) = 0.7292 - log(3) log(x) =~ 0.2521 x =~ 1.7868 or 1.79
 Graphs/262416: Find an equation of the line containing the given pair of points. write in slope-intercept form. (5,0) and (1,-3)1 solutions Answer 195479 by Alan3354(30993)   on 2010-02-05 10:22:35 (Show Source): You can put this solution on YOUR website!Do it like this: Given 2 points example. Find the equation of the line thru the points (2,1) and (3,5) --------------------- This is a 2 step process. First find the slope of the line thru the points. slope, m = diffy/diffx m = (5-1)/(3-2) m = 4 --------- Now use y = mx + b with either point to find b, the y-intercept. y = mx + b 5 = 4*3 + b b = -7 ------- y = mx + b y = 4x - 7 is the answer. ------------------------ For further assistance, or to check your work, email me via the thank you note.
 logarithm/265942: what is log10=1 solutions Answer 195477 by Alan3354(30993)   on 2010-02-05 10:10:58 (Show Source):
 Rational-functions/265976: SOLVE (2x-1)^2=201 solutions Answer 195474 by Alan3354(30993)   on 2010-02-05 09:51:17 (Show Source): You can put this solution on YOUR website!(2x-1)^2=20 2x-1 = +/-sqrt(20) 2x = 1 ± 2sqrt(5) x = (1/2) ± sqrt(5)
 Travel_Word_Problems/265966: write an equation of the line containing the given point and parrallell to the give line. express your answer in the form y=mx+b (5,9); x=6y=51 solutions Answer 195469 by Alan3354(30993)   on 2010-02-05 09:37:25 (Show Source): You can put this solution on YOUR website!Your equation has too many equal signs. ------------ Do it like this one: A line and a point example. Write in standard form the eqation of a line that satisfies the given conditions. Perpendicular to 9x+3y=36, through (1,2) ----------------- Find the slope of the line. Do that by putting the equation in slope-intercept form, y = mx + b. That means solve for y. 9x+3y = 36 3y= - 9x + 36 y = -3x + 13 The slope, m = -3 ------------------ The slope of lines parallel have the same slope. The slope of lines perpendicular is the negative inverse, m = +1/3 ---------------- Use y = mx + b and the point (1,2) to find b. 2 = (1/3)*1 + b b = 5/3 The equation is y = (1/3)x + 5/3 (slope-intercept form) x - 3y = -5 (standard form) ------------------------ For further assistance, or to check your work, email me via the thank you note.
 expressions/265971: solve the proportion 12/3 = b/521 solutions Answer 195468 by Alan3354(30993)   on 2010-02-05 09:36:00 (Show Source): You can put this solution on YOUR website!12/3 = b/52 4 = b/52 b = 208
 Complex_Numbers/265950: What is 7+ 4i divided by 9 - 3i?1 solutions Answer 195461 by Alan3354(30993)   on 2010-02-05 09:09:20 (Show Source): You can put this solution on YOUR website!You can make an Excel sheet to do these.
 Travel_Word_Problems/265958: Find an equation of the line containing the give pair of points (-6,-6) and (7,7)1 solutions Answer 195457 by Alan3354(30993)   on 2010-02-05 09:03:24 (Show Source): You can put this solution on YOUR website!Do it like this: Given 2 points example. Find the equation of the line thru the points (2,1) and (3,5) --------------------- This is a 2 step process. First find the slope of the line thru the points. slope, m = diffy/diffx m = (5-1)/(3-2) m = 4 --------- Now use y = mx + b with either point to find b, the y-intercept. y = mx + b 5 = 4*3 + b b = -7 ------- y = mx + b y = 4x - 7 is the answer. ------------------------ For further assistance, or to check your work, email me via the thank you note.
 test/265841: a model of an airplane is 11 in in length. the actual length of the airplane is 209 feet. what is the scale used to build the model?1 solutions Answer 195450 by Alan3354(30993)   on 2010-02-05 08:48:17 (Show Source): You can put this solution on YOUR website!It's 11 inches to 209 ft*12 in/ft = 1:228
 Travel_Word_Problems/265951: It is 50miles between dakota city and blue falls.It takes Mr.oliver one hour to make the drive.how fast does he drive?1 solutions Answer 195449 by Alan3354(30993)   on 2010-02-05 08:44:06 (Show Source): You can put this solution on YOUR website!He goes 50 miles in 1 hour. There are only 2 numbers, you give it a try.
 Radicals/265953: how do you find the simplest form of this expression? square root 5 x square root 71 solutions Answer 195447 by Alan3354(30993)   on 2010-02-05 08:41:54 (Show Source):
 Expressions-with-variables/265948: A Equation question: Jim budgets 2/7 of his salary for gambling. Last month he spent \$485 for gambling. What was his monthly salary? 1 solutions Answer 195444 by Alan3354(30993)   on 2010-02-05 08:33:02 (Show Source): You can put this solution on YOUR website!Jim budgets 2/7 of his salary for gambling. Last month he spent \$485 for gambling. What was his monthly salary? ---------- If \$485 is 2/7, then \$485/2 = 1/7 = \$242.50 7/7 = 7*\$242.50 = \$1697.50
 Square-cubic-other-roots/265799: Help me solve 7/sq root (x+3) = sq root (x+3) 7 divided by the sqrt (x+3) = sqrt (x+3)1 solutions Answer 195380 by Alan3354(30993)   on 2010-02-04 21:28:44 (Show Source): You can put this solution on YOUR website!Multiply by sqrt(x+3) 7 = x+3 x = 4
real-numbers/265802: For the following equation, state the value of the discriminant and then describe the nature of the solutions.
-4x^2+4x+7=0
What is the value of the discriminant?
1 solutions

Answer 195378 by Alan3354(30993)   on 2010-02-04 21:27:34 (Show Source):
You can put this solution on YOUR website!
The on-site solver covers this well.
 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 : . Discriminant d=128 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: -0.914213562373095, 1.9142135623731. Here's your graph:

 Linear-equations/265784: please help me solve this equation: 1/3(x-1)-3 = 1/4(3x+2)1 solutions Answer 195375 by Alan3354(30993)   on 2010-02-04 21:18:29 (Show Source): You can put this solution on YOUR website!1/3(x-1)-3 = 1/4(3x+2) Multiply by 12 4(x-1) - 36 = 3(3x+2) 4x-40 = 9x+6 -5x = 46 x = -46/5
 Polynomials-and-rational-expressions/265780: I am working on polynomials and was wondering if anyone knew the solution to the equation 10x-10y? 1 solutions Answer 195370 by Alan3354(30993)   on 2010-02-04 20:58:36 (Show Source): You can put this solution on YOUR website!It's not an equation. There's no equal sign. equal, equate, equation. Since it's not an equation, there's nothing to solve.
 Age_Word_Problems/265757: What is the awnser to Tonian is 25 years younger than her father. The sum of their age is 75. How old is each now. Please show all work. I cant figure it okay. I keep messing up on sometbing. 1 solutions Answer 195366 by Alan3354(30993)   on 2010-02-04 20:34:22 (Show Source): You can put this solution on YOUR website! What is the awnser to Tonian is 25 years younger than her father. The sum of their age is 75. How old is each now. ---------------- F = T + 25 F + T = 75 Sub for F in 2nd eqn (T+25) + T = 75 2T + 25 = 75 2T = 50 T = 25 F = 50
 Triangles/265374: what are the angles of a triangle that has sides of 21 28 and 301 solutions Answer 195359 by Alan3354(30993)   on 2010-02-04 19:41:16 (Show Source): You can put this solution on YOUR website!Use the law of cosines: c^2 = a^2 + b^2 - 2abcos(C) 900 = 441 + 784 - 2*21*28*cos(C) cos(C) =~ 0.27636 C =~ 73.96º --------------- Do the other 2 the same way, or use the Law of Sines
 Linear-equations/265679: what is the slope of y = 4x - 2 1 solutions Answer 195331 by Alan3354(30993)   on 2010-02-04 18:19:01 (Show Source):