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Recent problems solved by 'Alan3354'

Alan3354 answered: 30973 problems
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Polynomials-and-rational-expressions/496844: 6m^2- 7m-20 1 solutions Answer 336586 by Alan3354(30993)   on 2011-09-13 14:46:12 (Show Source): You can put this solution on YOUR website! What's your question?

Reduction-of-unit-multipliers/496860: Two cars, 360 kilometers apart begin driving toward each other on a long straight highway. One car travels 80 kilometers per hour and the other 100 kilometers per hour. At the same time a canary, starting on one car, flies back and fourth between the two cars as they approach each other. If the canary flies 120 kilometers per hour and spends no time to turn around at each car, how far has it flown when the cars collide? 1 solutions Answer 336585 by Alan3354(30993)   on 2011-09-13 14:42:40 (Show Source): You can put this solution on YOUR website! Two cars, 360 kilometers apart begin driving toward each other on a long straight highway. One car travels 80 kilometers per hour and the other 100 kilometers per hour. At the same time a canary, starting on one car, flies back and fourth between the two cars as they approach each other. If the canary flies 120 kilometers per hour and spends no time to turn around at each car, how far has it flown when the cars collide? ------------------- The cars are going in opposite directions so their speeds are added. 80 + 100 = 180 km/hr They start 360 km apart, so it takes them 360/180 = 2 hours to meet. ----------- The bird flies 120 km/hr for 2 hours = 240 km

Travel_Word_Problems/496425: suppose you are driving 250 km south and it takes 2.5 hours to get to destenation what is the average velocity? 1 solutions Answer 336475 by Alan3354(30993)   on 2011-09-12 20:39:32 (Show Source): You can put this solution on YOUR website! d = r*t r = d/t

Travel_Word_Problems/496430: I have this really weird homework question that I need help on. A passenger on a train traveling at 135 km/hr walks towards the back of the train at a rate of 7 km/hr. What is the passenger's rate of travel with respect to the ground? Please help as soon as possible. 1 solutions Answer 336473 by Alan3354(30993)   on 2011-09-12 20:38:10 (Show Source): You can put this solution on YOUR website! He's moving in the opposite direction, so his speed is subtracted. 135 - 7 = 128 km/hr --------------------- What's weird about that?

Equations/496435: What equation can show how many miles Earth travels? 1 solutions Answer 336472 by Alan3354(30993)   on 2011-09-12 20:36:39 (Show Source): You can put this solution on YOUR website! d = r*t r = speed in mi/hr = apx 67000 mi/hr t = hours

Travel_Word_Problems/496452: how far an airplane would fly in 3h if its average speed is 800km/h? 1 solutions Answer 336469 by Alan3354(30993)   on 2011-09-12 20:34:24 (Show Source): You can put this solution on YOUR website! Hint: d = r*t

Numbers_Word_Problems/496461: sara opened her book and found that the product of the page numbers for two facing pages was 342. What were the page numbers? 1 solutions Answer 336468 by Alan3354(30993)   on 2011-09-12 20:33:22 (Show Source): You can put this solution on YOUR website! sqrt(342) =~18.5 the center --> 18 & 19 -------------- If you factor 342, you see it has a 19.

Points-lines-and-rays/496323: How do you draw 3 lines in a plane intersecting exactly 1pt 1 solutions Answer 336431 by Alan3354(30993)   on 2011-09-12 18:20:34 (Show Source): You can put this solution on YOUR website! Plot a point, draw 3 lines thru it.

Surface-area/496266: how can i find the area for 6in, 7in, 18in, 12in 1 solutions Answer 336430 by Alan3354(30993)   on 2011-09-12 18:19:53 (Show Source): You can put this solution on YOUR website! Are those the sides of something? What?

Equations/496313: Hello, I'm having problems with this equation: What does the negative symbol represent if there is no number beside it? (The first one) I'm thinking it represents 1 or 0. Please help! :) 1 solutions Answer 336428 by Alan3354(30993)   on 2011-09-12 18:16:53 (Show Source): You can put this solution on YOUR website! I can see why. There's no equal sign. All equations have an equal sign. equal, equate, equation

Inequalities/496284: -3 greater than or less than x + 5 1 solutions Answer 336427 by Alan3354(30993)   on 2011-09-12 18:15:52 (Show Source): You can put this solution on YOUR website! Yes.

Inverses/496308: simplify 108 1 solutions Answer 336426 by Alan3354(30993)   on 2011-09-12 18:13:13 (Show Source): You can put this solution on YOUR website! 108 is as simple as it gets.

Linear-equations/496304: How do I solve when the directions simply state find intercepts and then graph the line of: 5y=-15=3x So far all I have is : y=3/5x-3 But I am unsure of what to do next 1 solutions Answer 336424 by Alan3354(30993)   on 2011-09-12 18:12:37 (Show Source): You can put this solution on YOUR website! You can't solve it, there are 2 variables (x & y) and 1 "equation." Also, 5y=-15=3x has too many equal signs.

Probability-and-statistics/496169: 4-2= 1 solutions Answer 336389 by Alan3354(30993)   on 2011-09-12 15:45:01 (Show Source): You can put this solution on YOUR website! Is this a joke?

Travel_Word_Problems/496147: During takeoff, an air plane goes from 0 to 360km/hr in 5 s. A.) What is its acceleration? B.) How fast is it going after 5 s? C.) How far has it traveled by the time it reaches 50m/s? 1 solutions Answer 336388 by Alan3354(30993)   on 2011-09-12 15:40:39 (Show Source): You can put this solution on YOUR website! duplicate

Rectangles/496152: Tina is traveling between two cities at a constant speed of 60 miles per hour. Express the time, t, that is takes her to travel from one city to the other as a function of the distance, m, between the two cities. Answer: t(m)= ______________ hours? 1 solutions Answer 336378 by Alan3354(30993)   on 2011-09-12 15:20:27 (Show Source): You can put this solution on YOUR website! Tina is traveling between two cities at a constant speed of 60 miles per hour. Express the time, t, that is takes her to travel from one city to the other as a function of the distance, m, between the two cities. ----------------- d = r*t t = d/r t = m/60 hours

Travel_Word_Problems/496138: If your traveling 21 mph for 49.25 miles how long will it take to travel 56 miles in hours and minutes 1 solutions Answer 336374 by Alan3354(30993)   on 2011-09-12 15:19:05 (Show Source): You can put this solution on YOUR website! If your [sic] traveling 21 mph for 49.25 miles how long will it take to travel 56 miles in hours and minutes -------------------- d = r*t t = d/r = 56/21 = 8/3 hours = 2 hr 40 minutes

Travel_Word_Problems/496145: If your car gets a gas mileage of 53 kilometers per gallon, how many gallons of gas would it take you to travel 3244 km from Chicago, IL to Los Angeles, CA? Represent your answer to the correct number of significant figures. 1 solutions Answer 336372 by Alan3354(30993)   on 2011-09-12 15:16:37 (Show Source): You can put this solution on YOUR website! = 3244/53 gallons I don't know what the "correct number" of sig figs is.

Travel_Word_Problems/496143: Two toy rockets are heading directly for each other. One is traveling at 50 mph and one is traveling at 70 mph. How far apart are these two rockets exactly one minute before they collide? 1 solutions Answer 336370 by Alan3354(30993)   on 2011-09-12 15:14:49 (Show Source): You can put this solution on YOUR website! The speeds are added when going in opposite directions. 50 + 70 = 120 mi/hr = 2 miles/minute --> 2 miles

Distributive-associative-commutative-properties/496140: hi I need help on my algebra the question is (6+3)+21=6+(3+21) 1 solutions Answer 336367 by Alan3354(30993)   on 2011-09-12 15:13:29 (Show Source): You can put this solution on YOUR website! That's not a question.

test/496142: I really need help. Plse and thinks;) 1 solutions Answer 336365 by Alan3354(30993)   on 2011-09-12 15:12:39 (Show Source): You can put this solution on YOUR website! You're welcome.

Signed-numbers/496116: what is 16-8/4 1 solutions Answer 336359 by Alan3354(30993)   on 2011-09-12 14:34:56 (Show Source): You can put this solution on YOUR website! It depends. Do you mean (16-8)/4 ? Or 16 - (8/4) ?

Mixture_Word_Problems/496101: Jennifer needs to make a solution that is 30% hydrochloric acid. If she must use all of the 25 mL of 60% hydrochloric acid she started with, then how much water needs to be mixed with the original solution? 1 solutions Answer 336355 by Alan3354(30993)   on 2011-09-12 14:22:13 (Show Source): You can put this solution on YOUR website! Since 30% is 1/2 of 60%, just add an equal amount of water. 25 mL of water. ------------- Or, 0.6*25 + 0*x = 0.3*(25+x) 15 = 7.5 + 0.3x 0.3x = 7.5 x = 25 mL

Linear-equations/496109: DIRECTIONS: Find the slope of a given line, if it is defined. #5. The line through the origin and the point (-4,10). *I know the formula for slope is.... m = y2-y1/x2-x1 *I know how to calculate the slope given 2 points but am having difficulty determining the origin. 1 solutions Answer 336352 by Alan3354(30993)   on 2011-09-12 14:17:40 (Show Source): You can put this solution on YOUR website! DIRECTIONS: Find the slope of a given line, if it is defined. #5. The line through the origin and the point (-4,10). *I know the formula for slope is.... m = y2-y1/x2-x1 *I know how to calculate the slope given 2 points but am having difficulty determining the origin. ---------------- m = diffy/diffx = (0-10)/(0+4) m = -2.5

Travel_Word_Problems/496108: How long would it take to drive 130 miles at70 mph 1 solutions Answer 336351 by Alan3354(30993)   on 2011-09-12 14:11:08 (Show Source): You can put this solution on YOUR website! d = r*t t = d/r

Linear-systems/496055: Is (3, 2) a solution to this system of equations? 8x + 7y = 37 2y = 4x - 2 1 solutions Answer 336311 by Alan3354(30993)   on 2011-09-12 12:11:10 (Show Source): You can put this solution on YOUR website! Is (3, 2) a solution to this system of equations? 8x + 7y = 37 2y = 4x - 2 ------------- Sub 3 for x and 2 for y and see. 8x + 7y = 37 8*3 + 7*2 =? 37 24 + 14 =? 37 not a solution.

absolute-value/496040: -[3x-2]=-10 1 solutions Answer 336308 by Alan3354(30993)   on 2011-09-12 11:55:19 (Show Source): You can put this solution on YOUR website! -[3x-2]=-10 [3x-2]=10 3x = 12 x = 4

Expressions-with-variables/496042: Solve using the substitution method 1/3 x - 1/5 y = 7 1/6 x + 2/5 y = -4 Not sure how to work substitution method using fractions. Need to find answer for both variables seperately. 1 solutions Answer 336306 by Alan3354(30993)   on 2011-09-12 11:41:25 (Show Source): You can put this solution on YOUR website! Solve using the substitution method 1/3 x - 1/5 y = 7 1/6 x + 2/5 y = -4 ----------------- Then eliminate the fractions and go from there. 1/3 x - 1/5 y = 7 times 15 --> 5x - 3y = 105 ----------------- 1/6 x + 2/5 y = -4 times 30 --> 5x + 12y = -120 ------------ 5x - 3y = 105 --> 5x = 3y + 105 5x + 12y = -120 ------------- Sub for 5x in the 2nd eqn (3y+105) + 12y = -120 15y = -225 y = -15 ----------- Sub for y in any eqn and find x

Linear-equations/495994: This problem is a linear equation please put into slope-intercept form, Im so confused everything im trying to do is confusing me. please and thank you. y=2x 2x+y=4 1 solutions Answer 336305 by Alan3354(30993)   on 2011-09-12 11:39:16 (Show Source): You can put this solution on YOUR website! Is that one problem, or 2?

test/496013: how much is 60% of 10 questions in a test 1 solutions Answer 336304 by Alan3354(30993)   on 2011-09-12 11:37:04 (Show Source): You can put this solution on YOUR website! 60% of 10 = (60/100)*10 = 6

Linear_Algebra/496035: 75x + 125y=1200 1 solutions Answer 336302 by Alan3354(30993)   on 2011-09-12 11:34:40 (Show Source): You can put this solution on YOUR website! Do you have a question?