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Recent problems solved by 'Alan3354'

Alan3354 answered: 30973 problems
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Length-and-distance/347103: Detroit road starts in the center of the city, and Lorain road starts 4 miles west of the center of city. Both roads run southwest. If these roads are put on a coordinate plane with the center of the city at (0,0), Lorain Road is represented by the equation y = -x – 4 And Detroit Road is represented by the equation y = - x . How far away is Lorain Road from Detroit road? 1 solutions Answer 248203 by Alan3354(30993)   on 2010-09-23 09:27:49 (Show Source): You can put this solution on YOUR website! Detroit road starts in the center of the city, and Lorain road starts 4 miles west of the center of city. Both roads run southwest. If these roads are put on a coordinate plane with the center of the city at (0,0), Lorain Road is represented by the equation y = -x – 4 And Detroit Road is represented by the equation y = - x . How far away is Lorain Road from Detroit road? ---------------------------- Roads with those equations run southeast and northwest, assuming north is the positive y direction. Ignoring that: Since the angles with the axes are 45 degs, the distance is 4*sin(45) = =~ 2.828 miles

Volume/347112: find the dimensions of the container (that has a volume of 500000 liters) so you can calculate the surface area. 1 solutions Answer 248201 by Alan3354(30993)   on 2010-09-23 09:19:28 (Show Source): You can put this solution on YOUR website! It depends on the shape of the bottle.

Travel_Word_Problems/347104: if a plane can travel 480mph with the wind and 380 against the wind, what is the plane's speed in still air? 1 solutions Answer 248196 by Alan3354(30993)   on 2010-09-23 08:54:04 (Show Source): You can put this solution on YOUR website! It's the average (480 + 380)/2 = 430 mph -------------- It's called airspeed, not "speed in still air" And planes use knots, not mph. 1 knot = 1 nautical mile per hour

Travel_Word_Problems/347061: Please help me with my calculus question.It is due tomorrow. A truck travelling along a straight section of highway, on a wet evening, braked suddenly to avoild blinky Bill who had wandered onto the road off in the distance.The reducing velocity of the truck under braking,v, in metres per second,is modelled by the equation: v=30e^-t/2 -5 where t is the number of seconds after the brakes were applied.Assume the truck held its line under braking conditions. 1.calculate how long it took the truck to come to a stop. Express your answer as both an exact value and accurate to 2 decimal places. 2. At what time after braking was the truck's velocity 15m/s.Express your answer as both an exact value and accurate to 2 decimal places. 1 solutions Answer 248177 by Alan3354(30993)   on 2010-09-23 07:44:08 (Show Source): You can put this solution on YOUR website! v=30e^-t/2 -5 where t is the number of seconds after the brakes were applied.Assume the truck held its line under braking conditions. 1.calculate how long it took the truck to come to a stop. Express your answer as both an exact value and accurate to 2 decimal places. -t/2 = ln(1/6) t = -ln(1/6)/2 t =~ 0.90 seconds -------------------------------- 2. At what time after braking was the truck's velocity 15m/s.Express your answer as both an exact value and accurate to 2 decimal places. -t/2 = ln(2/3) t = -ln(2/3)/2 t =~ 0.20 seconds

decimal-numbers/346799: What is the value of 3 in 11.36 seconds 1 solutions Answer 247991 by Alan3354(30993)   on 2010-09-22 17:55:39 (Show Source): You can put this solution on YOUR website! The value of 3 is 3, regardless of how much time passes.

test/346801: I am stressed out and I don't get algebra 2 class 1 solutions Answer 247989 by Alan3354(30993)   on 2010-09-22 17:54:26 (Show Source): You can put this solution on YOUR website! That can happen.

Vectors/346675: Find the cross product of v and w if v = <-1/3, 4, -3/8> and w = <6, -4/5, 4> (NOTE: There is suppose to be an arrow on top of all the letters) 1 solutions Answer 247863 by Alan3354(30993)   on 2010-09-22 12:23:02 (Show Source): You can put this solution on YOUR website! VxW = (157/10)i + (11/12)j - (356/15)k

Numbers_Word_Problems/346671: The perimeter for a sports field is 292ft.the length is 48ft longer than the width. what is the width of the field? what is the length of the field? 1 solutions Answer 247861 by Alan3354(30993)   on 2010-09-22 12:12:27 (Show Source): You can put this solution on YOUR website! Do it like this one: ---------------------- The length of a rectangle is 10 cm longer than its width. The perimeter of the rectangle is 68 cm. What are the length and width of the rectangle? ------- Perimeter = 2W + 2L = 68 W + L = 34 L = W + 10 Sub for L in the 1st eqn W + (W+10) = 34 2W + 10 = 34 W = 12 cm

Linear-equations/346662: my measurements for my laptop are 9x 13 how do I figure out the slope of this? 1 solutions Answer 247859 by Alan3354(30993)   on 2010-09-22 11:52:04 (Show Source): You can put this solution on YOUR website! More info is needed. Is 9 the width or the height? Do you want the slope from the lower left to upper right, or upper right to lover left? Or some other slope?

Systems-of-equations/346657: Find the solution of this system of eqautions. seperate the x- and y- values with a comma. x-2y=-29 x-y=-11 i really need help with this, i have stated what needs to be done with the equation at the top. 1 solutions Answer 247854 by Alan3354(30993)   on 2010-09-22 11:26:32 (Show Source): You can put this solution on YOUR website! Duplicate.

Systems-of-equations/346658: Find the solution of this system of eqautions. seperate the x- and y- values with a comma. x-2y=-29 x-y=-11 i really need help with this, i have stated what needs to be done with the equation at the top. 1 solutions Answer 247853 by Alan3354(30993)   on 2010-09-22 11:21:18 (Show Source): You can put this solution on YOUR website! x-2y=-29 x-y=-11 ---------- Subtract -y = -18 y = 18 x = 7

Circles/346646: Suppose you have a pipe with a circumference of 8 cm and length of 30 cm and that 8 turns of wire are wrapped around the pipe. What is the length of the wire? 1 solutions Answer 247852 by Alan3354(30993)   on 2010-09-22 11:19:37 (Show Source): You can put this solution on YOUR website! Assuming you mean that the wire makes it turns along the 30 cm length: 8 times the circumference is the base and the 30 cm is a side of a right triangle. The hypotenuse is the length. L =~ 70.68 cm

Numbers_Word_Problems/346650: What numbers are divisible by 200 but not 40. 1 solutions Answer 247848 by Alan3354(30993)   on 2010-09-22 11:05:52 (Show Source): You can put this solution on YOUR website! None.

Quadratic_Equations/346648: How do I solve this quadratic equation? ax^2+bx+c = 0 1 solutions Answer 247845 by Alan3354(30993)   on 2010-09-22 11:03:41 (Show Source): You can put this solution on YOUR website! google quadratic equation.

Geometry_Word_Problems/346638: The width of a rectangle is 9 cm shorter than its length. The peremeter of the rectangle is 40 cm. What are the longth and with of the rectangle? 1 solutions Answer 247844 by Alan3354(30993)   on 2010-09-22 11:00:35 (Show Source): You can put this solution on YOUR website! Do it like this one: ---------------------- The length of a rectangle is 10 cm longer than its width. The perimeter of the rectangle is 68 cm. What are the length and width of the rectangle? ------- Perimeter = 2W + 2L = 68 W + L = 34 L = W + 10 Sub for L in the 1st eqn W + (W+10) = 34 2W + 10 = 34 W = 12 cm L = 22 cm

Geometry_Word_Problems/346636: The lenght of a rectangle is 10 cm longer than its width. The peremeter of the rectangle is 68 cm. What are the length and width of the rectangle? 1 solutions Answer 247843 by Alan3354(30993)   on 2010-09-22 10:59:35 (Show Source): You can put this solution on YOUR website! The lenght of a rectangle is 10 cm longer than its width. The peremeter of the rectangle is 68 cm. What are the length and width of the rectangle? ------- Perimeter = 2W + 2L = 68 W + L = 34 L = W + 10 Sub for L in the 1st eqn W + (W+10) = 34 2W + 10 = 34 W = 12 L = 22

Travel_Word_Problems/346643: a train travels 300km in 5hours.find the speed? 1 solutions Answer 247842 by Alan3354(30993)   on 2010-09-22 10:56:56 (Show Source): You can put this solution on YOUR website! You have 2 numbers. give it a try.

Quadratic_Equations/346644: How do I solve this quadratic equation? x^2 +4x - 6 1 solutions Answer 247841 by Alan3354(30993)   on 2010-09-22 10:56:06 (Show Source): You can put this solution on YOUR website! It's not an equation, there's no equal sign.

Numbers_Word_Problems/346640: I just realized that I missed a letter from my e-mail address, can you please fixed. Thanks. My e-mail address is rawlinsbeverly@yahoo.com I misspelled beverly. Sorry for any inconvience. 1 solutions Answer 247839 by Alan3354(30993)   on 2010-09-22 10:49:08 (Show Source): You can put this solution on YOUR website! Do you have a question?

Rational-functions/346593: the square root of 7 the square root of 3 1 solutions Answer 247830 by Alan3354(30993)   on 2010-09-22 10:35:05 (Show Source): You can put this solution on YOUR website! Use a calculator.

Rate-of-work-word-problems/346639: Sally can mow a typical yard in 3 hours and joe and mo0w the same yard in 5hours. working together exactly how many hours will it take to mow 1 yard? 1 solutions Answer 247829 by Alan3354(30993)   on 2010-09-22 10:32:30 (Show Source): You can put this solution on YOUR website! Do it like this one. -------------------- One computer can print a company's mailing labels in 40 minutes. A second printer would take 60 minutes to print the lablels. How long would it take the two printes, operating together, to print the labels? -------------------------------------------------------- One does 1/40 of the job per minute. The other does 1/60 per minute. Together, they do 1/40 + 1/60 per minute = 3/120 + 2/120 = 1/24 job per minute --> 24 minutes per job -------------------------- Use the shortcut, product over sum: 40*60/(40+60) = 24 minutes

Miscellaneous_Word_Problems/346637: To make pickles, fresh cucumbers are soaked in a salt water solution called brine. How many liters of a 4% brine solution must be added to 20 liters of a 12% brine solution to dilute it to an 8% solution? 1 solutions Answer 247826 by Alan3354(30993)   on 2010-09-22 10:27:13 (Show Source): You can put this solution on YOUR website! 8 is the average of 4 and 12, so it's equal amounts. --> 20 liters. --------------------- I don't like pickles.

Functions/346607: f(x+7)=x²+8x-1 1 solutions Answer 247824 by Alan3354(30993)   on 2010-09-22 10:24:52 (Show Source): You can put this solution on YOUR website! Do you have a question?

Probability-and-statistics/346601: Shown below is a rather strangely numbered target. One day a marksman was parcticing. He took six shots and made a score of exactly 100. where did his shots land. 24 16 23 17 39 1 solutions Answer 247823 by Alan3354(30993)   on 2010-09-22 10:23:43 (Show Source): You can put this solution on YOUR website! 17*4 and 16*2 = 100

Complex_Numbers/346591: how to solve a complex rational algebraic expression 1 solutions Answer 247815 by Alan3354(30993)   on 2010-09-22 10:06:14 (Show Source): You can put this solution on YOUR website! It's not possible. Equations are solved, not expressions.

Graphs/346605: WHAT IS Y=1/4X 1 solutions Answer 247814 by Alan3354(30993)   on 2010-09-22 10:03:10 (Show Source): You can put this solution on YOUR website! It's an equation giving y in terms of x. ---------------------------- y = (1/4)x or y = 1/(4x)

Numbers_Word_Problems/346608: Can you please help me find the answer to: One computer can print a company's mailing labels in 40 minutes. A second printer would take 60 minutes to print the lablels. How long would it take the two printes, operating together, to print the labels? Thank you. 1 solutions Answer 247812 by Alan3354(30993)   on 2010-09-22 10:00:26 (Show Source): You can put this solution on YOUR website! One does 1/40 of the job per minute. The other does 1/60 per minute. Together, they do 1/40 + 1/60 per minute = 3/120 + 2/120 = 1/24 job per minute --> 24 minutes per job -------------------------- Use the shortcut, product over sum: 40*60/(40+60) = 24 minutes

Equations/346590: how do i solve y+32=40 1 solutions Answer 247767 by Alan3354(30993)   on 2010-09-22 08:03:46 (Show Source): You can put this solution on YOUR website! Subtract 32 from both sides.

Problems-with-consecutive-odd-even-integers/346367: The sum of three consecutive even integers is 30. Find the integers? 1 solutions Answer 247709 by Alan3354(30993)   on 2010-09-21 20:47:58 (Show Source): You can put this solution on YOUR website! 30/3 = 10 = the middle number

Age_Word_Problems/346406: There are 3 Pizza with different diameters. pizza with 7cm dia costs $70, pizza with 14cm dia costs $350 and pizza with 21cm dia costs $700. Which pizza is the best value for money? 1 solutions Answer 247702 by Alan3354(30993)   on 2010-09-21 20:40:29 (Show Source): You can put this solution on YOUR website! There are 3 Pizza with different diameters. pizza with 7cm dia costs $70, pizza with 14cm dia costs $350 and pizza with 21cm dia costs $700. Which pizza is the best value for money? ----------------------- Area is a function of the square of the diameter. 14cm dim = 4 times the area of the 7 cm at 5 times the price 21cm dim = 9 times the area of the 7 cm at 10 times the price The smallest one costs the least per unit area of pizza, and is the "best deal", neglecting any other factors.

Square-cubic-other-roots/346173: 20sqrt*80sqrt*200sqrt 1 solutions Answer 247631 by Alan3354(30993)   on 2010-09-21 16:48:46 (Show Source): You can put this solution on YOUR website! square root of what?