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# Recent problems solved by 'Alan3354'

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 Linear-equations/721095: x intercept is -π; y intercept is 1,Please help me find the equation of the line1 solutions Answer 442191 by Alan3354(30959)   on 2013-03-02 20:53:41 (Show Source): You can put this solution on YOUR website!x intercept is -π; y intercept is 1,Please help me find the equation of the line ------------- 1*x - pi*y = -pi
 Average/721088: what is the median value of the following 6 test scores: 60,707,70,80,85,95.1 solutions Answer 442184 by Alan3354(30959)   on 2013-03-02 20:18:18 (Show Source): You can put this solution on YOUR website!what is the median value of the following 6 test scores: 60,707,70,80,85,95. ---------- 60, 70, 80, 85, 95, 707 --> (80 + 85)/2 = 82.5
 Linear-systems/721025: Given the system of equations, what is the value of the determinant? 3x + y = 9 2x - 4y = 61 solutions Answer 442183 by Alan3354(30959)   on 2013-03-02 20:16:12 (Show Source): You can put this solution on YOUR website!Given the system of equations, what is the value of the determinant? 3x + y = 9 2x - 4y = 6 ------------ -12 - 2 = -14 Det = -14
 Linear_Equations_And_Systems_Word_Problems/721085: A plane travels 400 mi against the wind in 4 hrs, and makes the return trip in 1 hr . What is the wind speed? help!1 solutions Answer 442182 by Alan3354(30959)   on 2013-03-02 20:14:27 (Show Source): You can put this solution on YOUR website!Do it like this one: -------- A boat travels 24 mi downstream in 3 hrs and returns in 12 hrs. Speed of the stream? -------------- The speed of the boat (wrt the land) is the average of the speed up & downstream. 24/3 = 8 mi/hr 24/12 = 2 mi/hr --- Boat's speed = (8+2)/2 = 5 mi/hr ---- The current is the difference 8 - 5 = 3 mi/hr
 Linear_Equations_And_Systems_Word_Problems/721084: A boat travels 24 mi downstream in 3 hrs and returns in 12 hrs. Speed of the stream? time = x speed of stream = y 3x + y =24 12x + y = 24 Have no idea what to do. Help. 1 solutions Answer 442181 by Alan3354(30959)   on 2013-03-02 20:13:30 (Show Source): You can put this solution on YOUR website!A boat travels 24 mi downstream in 3 hrs and returns in 12 hrs. Speed of the stream? -------------- The speed of the boat (wrt the land) is the average of the speed up & downstream. 24/3 = 8 mi/hr 24/12 = 2 mi/hr --- Boat's speed = (8+2)/2 = 5 mi/hr ---- The current is the difference 8 - 5 = 3 mi/hr
 Linear_Equations_And_Systems_Word_Problems/721078: University Theater sold 445 tickets for a play. Tickets cost \$20 per adult and \$12 per senior citizen. If total receipts were \$6156, how many senior citizen tickets were sold? a=adults s=seniors a+s=445 20a+12s=6156 20a+12s=6165 a + s = 445 19a + 11s=5711 Don't know what else to do. Help?1 solutions Answer 442171 by Alan3354(30959)   on 2013-03-02 19:35:58 (Show Source): You can put this solution on YOUR website!University Theater sold 445 tickets for a play. Tickets cost \$20 per adult and \$12 per senior citizen. If total receipts were \$6156, how many senior citizen tickets were sold? a=adults s=seniors a+s=445 20a+12s=6156 20a+12s=6165 a + s = 445 19a + 11s=5711 Don't know what else to do. ========================== a + s = 445 20a+12s=6156 ---- Multiply the 1st eqn by 12 12a + 12s = 5340 20a + 12s = 6156 -------------------- Subtract -8a = -816 a = 102
 Trigonometry-basics/721004: Find all solutions to the equation: 2sin^2x + 3sinx + 1=0?? This is how I attempted to solve the problem. Replace sin with x 2x^2 +3x+1=0 Then I used "flower power" Borrow x x^2+3x+2=0 Then u simply (sin+1)(sin+2)=0 sin+1=0. sin+2=0 sin= -1. sin=-2 =270º. =?1 solutions Answer 442128 by Alan3354(30959)   on 2013-03-02 15:01:22 (Show Source): You can put this solution on YOUR website!duplicate
 Numbers_Word_Problems/720907: the sum of two consecutive number is greater than 35 .find the smallest values of the numbers1 solutions Answer 442116 by Alan3354(30959)   on 2013-03-02 13:32:34 (Show Source): You can put this solution on YOUR website!the sum of two consecutive number is greater than 35 .find the smallest values of the numbers --------------- 5*6 = 30 6*7 = 42
 Graphs/720980: Graphing relations. Please solve x= - square root y1 solutions Answer 442115 by Alan3354(30959)   on 2013-03-02 13:30:43 (Show Source): You can put this solution on YOUR website!Graphing relations. Please solve x= - square root y -------------- Solve for what?
 test/720984: What is the quadratic equation with the given roots of 3 and -4?1 solutions Answer 442114 by Alan3354(30959)   on 2013-03-02 13:30:09 (Show Source): You can put this solution on YOUR website!Do it like this one. ------------ What is the quadratic equation for the given roots of -7 and -8? --------- If the roots are a & b, then (x-a)*(x-b) = 0 is an equation ----- --> (x+7)*(x+8) = 0
 test/720983: What is the quadratic equation for the given roots of -7 and -8?1 solutions Answer 442112 by Alan3354(30959)   on 2013-03-02 13:29:38 (Show Source): You can put this solution on YOUR website!What is the quadratic equation for the given roots of -7 and -8? --------- If the roots are a & b, then (x-a)*(x-b) = 0 is an equation ----- --> (x+7)*(x+8) = 0
 Linear-equations/720988: my math teacher wants me to write the slope and y/x intercepts for a line but while i did find the slope the line crosses neither the x or y axis several lines are like this and I am thourghly stumped please help1 solutions Answer 442111 by Alan3354(30959)   on 2013-03-02 13:28:02 (Show Source): You can put this solution on YOUR website!my math teacher wants me to write the slope and y/x intercepts for a line but while i did find the slope the line crosses neither the x or y axis several lines are like this and I am thourghly stumped please help --------------- Post the line you mean. All lines cross at least one of the axes.
 �t�e�s�t/720975: what is the answer to 9y exponent 2 + 18y - 12 = 6y its dealing with factoring trinomials: ax exponent 2 + bx + c.1 solutions Answer 442109 by Alan3354(30959)   on 2013-03-02 13:04:56 (Show Source): You can put this solution on YOUR website!what is the answer to 9y exponent 2 + 18y - 12 = 6y its dealing with factoring trinomials: ax exponent 2 + bx + c. --------------- Use ^ (Shift 6) for exponents. 9y^2 + 18y - 12 = 6y Subtract 6y 9y^2 + 12y - 12 = 0 Divide by 3 3y^2 + 4y - 4 = 0 (3y - 2)(y + 2) = 0 y = -2, 2/3 =============== "what is the answer to..." depends on the question. You should say "solve for y" if that's what you want to do.
 Pythagorean-theorem/720915: find the area 5 cm , 5 cm , 11 cm , square root 611 solutions Answer 442069 by Alan3354(30959)   on 2013-03-02 08:48:43 (Show Source): You can put this solution on YOUR website!find the area 5 cm , 5 cm , 11 cm , square root 61 ------------ What sort of figure is it?
 Numeric_Fractions/720824: what is 1/3x+6=91 solutions Answer 441994 by Alan3354(30959)   on 2013-03-01 19:48:31 (Show Source): You can put this solution on YOUR website!what is 1/3x+6=9 ---------- It's an equation.
 Travel_Word_Problems/720815: Don Williams uses his small motorboat to go 4 miles upstream to his favorite fishing spot. Against the current, the trip takes 2/5 hours. With the current the trip takes 1/5. How fast can the boat travel in still water. What is the speed of the current?? thanks.1 solutions Answer 441987 by Alan3354(30959)   on 2013-03-01 19:23:09 (Show Source): You can put this solution on YOUR website!Don Williams uses his small motorboat to go 4 miles upstream to his favorite fishing spot. Against the current, the trip takes 2/5 hours. With the current the trip takes 1/5. How fast can the boat travel in still water. What is the speed of the current?? -------------------- 1 ? is sufficient. --- Find the speed upstream and downstream using d = r*t. How fast can the boat travel in still water. (A ? would be good there.) It's the average of the speed upstream and downstream. ------------- The speed of the current (called the current) is the difference between the waterspeed and the groundspeed. =============================== This problem has been posted and solved 1000's of times on this site. Look it up.
 Numeric_Fractions/720786: 1/5x+2=-31 solutions Answer 441982 by Alan3354(30959)   on 2013-03-01 18:48:45 (Show Source): You can put this solution on YOUR website!1/5x+2=-3 --- Subtract 2 --------- 1/5x = -5 Multiply by 5x 1 = -25x Divide by -25 x = -1/25
 Trigonometry-basics/720797: Find x so the distance between (x, 2)and (3, 3) is sgrt 5. I know that you need to use the distance formula, however I do not know how to get rid of the x. Someone please help! 1 solutions Answer 441978 by Alan3354(30959)   on 2013-03-01 18:23:42 (Show Source): You can put this solution on YOUR website!Find x so the distance between (x, 2)and (3, 3) is sgrt 5. I know that you need to use the distance formula, however I do not know how to get rid of the x. --------------- You don't get rid of it, you solve for it. ----- Use the distance formula: x-3 = 2 --> x = 5 ------------ x-3 = -2 --> x = 1
 Surface-area/720783: If A=529 pi squared centimeters, r=1 solutions Answer 441968 by Alan3354(30959)   on 2013-03-01 18:06:02 (Show Source): You can put this solution on YOUR website!If A=529 pi squared centimeters, r= ---------- Solve for r
 Triangles/720780: what is triangle x 361 solutions Answer 441967 by Alan3354(30959)   on 2013-03-01 18:04:59 (Show Source): You can put this solution on YOUR website!what is triangle x 36 ------------- I don't know.
 Travel_Word_Problems/720718: please help me solve this word problem: Jane leaves her house and drives in a straight line at a speed of 38 mph. Her speed on the return trip is 48 mph. The trip back home takes 15 minutes less than the outbound trip. What was Jane's total travel time in hours? Assume both trips are in a straight line. Give your answer to 2 decimal places.1 solutions Answer 441950 by Alan3354(30959)   on 2013-03-01 15:57:54 (Show Source): You can put this solution on YOUR website!Jane leaves her house and drives in a straight line at a speed of 38 mph. Her speed on the return trip is 48 mph. The trip back home takes 15 minutes less than the outbound trip. What was Jane's total travel time in hours? Assume both trips are in a straight line. Give your answer to 2 decimal places. ------------------- 15 mins = 1/4 hour --- t = time at 38 mi/hr in hours d = 38t d = 48*(t- 1/4) --- 38t = 48t - 12 -10t = -12 t = 1.2 hours (at 38 mi/hr) Total time = t + (t - 1/4) = 2.15 hours
 Graphs/720769: how do you solve y = -x1 solutions Answer 441949 by Alan3354(30959)   on 2013-03-01 15:52:38 (Show Source): You can put this solution on YOUR website!how do you solve y = -x -------------- It is solved.
 Radicals/720403: Help us simplify: 4sqrt of n^4/161 solutions Answer 441942 by Alan3354(30959)   on 2013-03-01 14:44:09 (Show Source): You can put this solution on YOUR website!Help us simplify: 4sqrt of n^4/16 ------------- If you mean the 4th root: ----------- There are 3 others, but this is the principal 4th root.
 Quadratic_Equations/720500: if you drop an object off the roof of an apartment building that is 240 feet tall, about how long will it take the object to hit the ground? 1 solutions Answer 441941 by Alan3354(30959)   on 2013-03-01 14:41:42 (Show Source): You can put this solution on YOUR website!if you drop an object off the roof of an apartment building that is 240 feet tall, about how long will it take the object to hit the ground? ----------------- s = 16t^2 is commonly used for acceleration on Earth due to gravity (in feet) 240 = 16t^2 t^2 = 15 t = sqrt(15) seconds =~ 3.873 seconds
 Equations/720674: solve all real and imaginary solution z^4-16=01 solutions Answer 441932 by Alan3354(30959)   on 2013-03-01 12:05:34 (Show Source): You can put this solution on YOUR website!z^4-16=0 ---------- z = -2, +2 -------------- z = -2i, +2i
 Rectangles/720695: The height h(t), in feet, of an airborne tee-shirt t seconds after being launched can be approximated by h(t)=-15t²+60t+10,0≤t≤10. Find the times when the Tee-shirt will reach a fan 55feet above ground level.1 solutions Answer 441930 by Alan3354(30959)   on 2013-03-01 11:47:39 (Show Source): You can put this solution on YOUR website!The height h(t), in feet, of an airborne tee-shirt t seconds after being launched can be approximated by h(t)=-15t²+60t+10,0≤t≤10. Find the - times when the Tee-shirt will reach a fan 55feet above ground level. ------------- h(t)=-15t²+60t+10 = 55 Solve for t, 2 values
 test/720692: What would the equation be that you would use to solve the following problem? Find two consecutive odd integers whose product is 483.1 solutions Answer 441929 by Alan3354(30959)   on 2013-03-01 11:35:17 (Show Source): You can put this solution on YOUR website!Find two consecutive odd integers whose product is 483. -------------- I don't know of a formula. You can do it like this: x*(x+2) = 483 ------------ Better way: = almost 22, the center --> 21 & 23
 Travel_Word_Problems/720447: If you were to walk 2200 miles averaging 2 miles per hour how many hours would it take? 1 solutions Answer 441827 by Alan3354(30959)   on 2013-02-28 19:35:14 (Show Source): You can put this solution on YOUR website!If you were to walk 2200 miles averaging 2 miles per hour how many hours would it take? ----------------- d = r*t t = d/r
 test/720417: Which line is parallel to a line having the equation y=3x+11 solutions Answer 441814 by Alan3354(30959)   on 2013-02-28 18:48:19 (Show Source): You can put this solution on YOUR website!Which line is parallel to a line having the equation y=3x+1 ------------- All lines with the same slope, m = 3 --- y = 3x + b, b is any number (except 1, that would make it coincident)
 Equations/720398: ((x^2)y)+4=(x(y^2))-2, x=? and y=? I do not know where to start with this type of equation.1 solutions Answer 441807 by Alan3354(30959)   on 2013-02-28 18:19:54 (Show Source): You can put this solution on YOUR website!((x^2)y)+4=(x(y^2))-2, x=? and y=? I do not know where to start with this type of equation. ------------ You have parentheses that don't contribute anything. x^2y + 4 = xy^2 - 2, x=? and y=? ------------- It's 1 equation with 2 variables. What is it you want to do? There's no unique solution of x & y. You can pick any value for x and find y, or v.v.
 Evaluation_Word_Problems/720361: the equation p=2t+2w gives the perimeter p of a rectangle with length l an width w.1 solutions Answer 441805 by Alan3354(30959)   on 2013-02-28 18:01:08 (Show Source): You can put this solution on YOUR website!the equation p=2t+2w gives the perimeter p of a rectangle with length l an width w. ------------------ That's possible.