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 percentage/616380: How much would sales tax be on a item that cost \$138.00, how much would this item cost with taxes?1 solutions Answer 387668 by Alan3354(31487)   on 2012-05-30 20:35:43 (Show Source): You can put this solution on YOUR website!How much would sales tax be on a item that cost \$138.00, how much would this item cost with taxes? --------------- It depends on the tax rate.
 Evaluation_Word_Problems/616370: A water balloon is dropped from a cliff. Exactly. Exactly 3 sec. later, the sound of the balloon hitting the ground reaches the top of the cliff. How high is the cliff?1 solutions Answer 387667 by Alan3354(31487)   on 2012-05-30 20:21:36 (Show Source): You can put this solution on YOUR website!A water balloon is dropped from a cliff. Exactly. Exactly 3 sec. later, the sound of the balloon hitting the ground reaches the top of the cliff. How high is the cliff? ----------------- The speed of sound is temperature dependent. You'll have to give the formula for it, or the speed to use.
 Travel_Word_Problems/616368: A boat travels 66 miles in 2 hours. What is its rate in feet per seconds?1 solutions Answer 387666 by Alan3354(31487)   on 2012-05-30 20:18:55 (Show Source): You can put this solution on YOUR website!A boat travels 66 miles in 2 hours. What is its rate in feet per seconds? ----------- 66 miles = 66*5280 feet 2 hours = 7200 seconds
 Exponents/616376: why is there parentheses around exponents that have parentheses already around them? 1 solutions Answer 387664 by Alan3354(31487)   on 2012-05-30 20:14:17 (Show Source): You can put this solution on YOUR website!why is there parentheses around exponents that have parentheses already around them? --------- idk. Show an example.
 Circles/616392: a certain cars windsheild wiper clears a portion of a sector as shown at right. if the angle the wiper pivots during each swing is 120 degrees, find the area of the windshield that is wiped during each swing.1 solutions Answer 387663 by Alan3354(31487)   on 2012-05-30 20:13:00 (Show Source): You can put this solution on YOUR website!shown at right. ------------- Nothing is shown
 absolute-value/616398: You have two saltwater solutions. One consists of 20% salt, and the other consists of 15% salt. A. If you want to add these two together to make 5 gallons of a 17% solution, how much of each solution should you add? B. If you wanted to make 5 gallons of a 19% solution, what volume of each solution should you add?1 solutions Answer 387662 by Alan3354(31487)   on 2012-05-30 20:11:56 (Show Source): You can put this solution on YOUR website!Do them like this: -------------------------- if a 14% acid solution is mixed with a 19% acid solution to produce 45 gallons of a 15% acid solution how much (in gallons) of each solution should be used? -------------- f = 14% n = 19% ---- f + n = 45 (total gallons) 14f + 19n = 15*45 (total acid) ----- n = 45 - f Sub for n 14f + 19*(45-f) = 675 14f + 855 - 19f = 675 -5f = -180 f = 36 gallons of 14% n = 9 gallons of 19%
 Circles/616347: Each circle is tangent to the other two. If the diameter of the large circle is 12, the area of the shaded region is ________?1 solutions Answer 387653 by Alan3354(31487)   on 2012-05-30 19:22:24 (Show Source): You can put this solution on YOUR website!No shaded region is shown. We don't need the ______________?
 Triangles/616322: The area of a triangle is 85 m2, and the length of its base is 5 m. Find the height. 1 solutions Answer 387642 by Alan3354(31487)   on 2012-05-30 18:11:34 (Show Source): You can put this solution on YOUR website!The area of a triangle is 85 m2, and the length of its base is 5 m. Find the height. ---------- Area = b*h/2
 Circles/616272: Describe the relationship between a central angle and its intercepted arc1 solutions Answer 387640 by Alan3354(31487)   on 2012-05-30 18:10:38 (Show Source): You can put this solution on YOUR website!Describe the relationship between a central angle and its intercepted arc ----------- Length of the arc = angle*radius (angle in radians)
 Rate-of-work-word-problems/616338: you work 3 hours 2 days.how many hours do you work in 6 days?1 solutions Answer 387639 by Alan3354(31487)   on 2012-05-30 18:08:08 (Show Source): You can put this solution on YOUR website!you work 3 hours 2 days.how many hours do you work in 6 days? ------------ It's not clear.
 logarithm/616332: It would be very appreciated if somebody could solve these for me.. sorry for the bad formatting, I'm not used to typing equations. :P 1. 1/4log(2)16 + 1/2log(2)49 = log(2)x 2. 4^(3x) = 10 3. log(3)0.1 + 2log(3)x = log(3)2 + log(3)5 1 solutions Answer 387638 by Alan3354(31487)   on 2012-05-30 18:05:31 (Show Source): You can put this solution on YOUR website!1. 1/4log(2)16 + 1/2log(2)49 = log(2)x x = 14 ------------------ 2. 4^(3x) = 10 3x*log(4) = log(10) = 1 3x = 1/log(4) x = 1/(3log(4) = 1/log(64) x =~ 0.55365 ---------------- 3. log(3)0.1 + 2log(3)x = log(3)2 + log(3)5 Similar to #1
 Rectangles/616341: A rectangle has an area of 196 m2 and a minimum perimeter. What is the length of the rectangle?1 solutions Answer 387637 by Alan3354(31487)   on 2012-05-30 17:59:35 (Show Source): You can put this solution on YOUR website!A rectangle has an area of 196 m2 and a minimum perimeter. What is the length of the rectangle? ---------------- Minimum perimeter is a square --> 14 by 14 meters
 Rectangles/616301: What is the greatest perimeter of a rectangle with area 64 cm2?1 solutions Answer 387625 by Alan3354(31487)   on 2012-05-30 16:53:31 (Show Source): You can put this solution on YOUR website!What is the greatest perimeter of a rectangle with area 64 cm2? ---------------- There is no greatest perimeter. It might be 0.001 cm by 64000 --> 128000.002 cm ---------- Or 0.000001 by 64,000,000, etc
 Exponential-and-logarithmic-functions/616311: x^2+x-61 solutions Answer 387622 by Alan3354(31487)   on 2012-05-30 16:50:04 (Show Source): You can put this solution on YOUR website!------------- Do you have a question?
 Exponential-and-logarithmic-functions/616312: 7x^2+27x-41 solutions Answer 387621 by Alan3354(31487)   on 2012-05-30 16:49:37 (Show Source): You can put this solution on YOUR website!------------- Do you have a question?
 Exponential-and-logarithmic-functions/616315: 7-12x-4x^21 solutions Answer 387618 by Alan3354(31487)   on 2012-05-30 16:48:48 (Show Source): You can put this solution on YOUR website!------------- Do you have a question?
 Exponential-and-logarithmic-functions/616313: 15y^2-2y+71 solutions Answer 387617 by Alan3354(31487)   on 2012-05-30 16:48:15 (Show Source): You can put this solution on YOUR website!15y^2-2y+7 ------------- Do you have a question?
 Signed-numbers/616275: how do you solve a negitive number and a positive number? 1 solutions Answer 387606 by Alan3354(31487)   on 2012-05-30 16:14:21 (Show Source): You can put this solution on YOUR website!how do you solve a negitive number and a positive number? ------------- Numbers are not solved. Equations are solved.
 Trigonometry-basics/616295: Solve 2tan theta=2cot theta for all values of theta if theta is measured in degrees1 solutions Answer 387603 by Alan3354(31487)   on 2012-05-30 16:09:55 (Show Source): You can put this solution on YOUR website!2tan theta=2cot theta tan = cot tan = 1/tan tan^2 = 1 tan = ±1 theta = 45 + n*90 degs, n = ± 0,1,2,3...
 Volume/616245: How many litres of water are there in 2.4m x 2.1m and 2m deep square 1 solutions Answer 387576 by Alan3354(31487)   on 2012-05-30 14:49:03 (Show Source): You can put this solution on YOUR website!How many litres of water are there in 2.4m x 2.1m and 2m deep square ----------- Vol = L*W*H cubic meters 1 cubic meter = 1000 liters
 Volume/616235: If 280 cubic inches of water are poured into a cylinder that is 7 inches in diameter and 12 inches tall how deep will the water be?1 solutions Answer 387572 by Alan3354(31487)   on 2012-05-30 14:06:45 (Show Source): You can put this solution on YOUR website!If 280 cubic inches of water are poured into a cylinder that is 7 inches in diameter and 12 inches tall how deep will the water be? ------------- h =~ 7.2757 inches
 Polygons/616160: A polygon has n sides. Two of its exterior angles are 72 and 35 while the remaining exterior angles are each equal to 23. Find the value of n.1 solutions Answer 387513 by Alan3354(31487)   on 2012-05-30 10:07:38 (Show Source): You can put this solution on YOUR website!A polygon has n sides. Two of its exterior angles are 72 and 35 while the remaining exterior angles are each equal to 23. Find the value of n. ------------- The sum of exterior angles is 360 degs ---- 360 - (72+35) = 253 degs 253/23 = 11 angles of 23 degs 11 + 2 = 13 sides n = 13
 Geometry_Word_Problems/616155: the area of a rectangle is 72 inČ The width is 6 inches greater than the length What expression represents the width1 solutions Answer 387512 by Alan3354(31487)   on 2012-05-30 10:04:28 (Show Source): You can put this solution on YOUR website!the area of a rectangle is 72 inČ The width is 6 inches greater than the length What expression represents the width ----------- 72 = 6*12 --------- The hard way: w*(w+6) = 72 Now we have to factor anyway, and get w = 6, w = 12. Sometimes the answer is obvious. ----- If it said, "the area of a rectangle is 73 inČ The width is 6 inches greater than the length What expression represents the width" then you have to do some math.
 Linear-systems/616149: x+y=4 x-y=8 which of the 3 methods (graphing, substitution, or elimination) would you use to solve this linear system,1 solutions Answer 387511 by Alan3354(31487)   on 2012-05-30 09:57:51 (Show Source): You can put this solution on YOUR website!x+y=4 x-y=8 --------- I'd use elimination, just add them.
 Mixture_Word_Problems/616158: ali has 3 liters of water. he uses 950 milliters to water his plants. now how many milliters does he have left1 solutions Answer 387510 by Alan3354(31487)   on 2012-05-30 09:55:06 (Show Source): You can put this solution on YOUR website!ali has 3 liters of water. he uses 950 milliters to water his plants. now how many milliters does he have left ------------ I assume you mean milliliters. Hint: 3 liters = 3000 milliliters
 Functions/616157: if the varies directly as x what is the value of y in these ordered paris? (5,20) and(15,y)1 solutions Answer 387509 by Alan3354(31487)   on 2012-05-30 09:54:04 (Show Source): You can put this solution on YOUR website!if the varies directly as x what is the value of y in these ordered paris? (5,20) --> y = 4x ----------- (15,y)
 Money_Word_Problems/616020: I get \$1.00 each year to correspond with my age (\$1.00 at at 1, \$2.00 at age 2, etc.) each year until age 100. How much \$\$ do I have at 100?1 solutions Answer 387462 by Alan3354(31487)   on 2012-05-29 22:01:30 (Show Source): You can put this solution on YOUR website!I get \$1.00 each year to correspond with my age (\$1.00 at at 1, \$2.00 at age 2, etc.) each year until age 100. How much \$\$ do I have at 100? --------- The sum of the integers from 1 to 100 = 5050.
 Proofs/616027: Hi just needed some help in solving this equation it may be invalid so means that it can't be solved or it may be valid meaning it can be solved and I am stuck so not sure if I am right or not. Here it is: VxEy(Rxy) l- VxEy(Rxy & Ez(Ryz)) Thanks1 solutions Answer 387460 by Alan3354(31487)   on 2012-05-29 21:59:58 (Show Source): You can put this solution on YOUR website!VxEy(Rxy) l- VxEy(Rxy & Ez(Ryz)) ---------- That's not an equation, there's no equal sign. --> nothing to solve.
 Travel_Word_Problems/616025: If you are traveling 140 MPH, how far would you travel in one second?1 solutions Answer 387459 by Alan3354(31487)   on 2012-05-29 21:58:36 (Show Source): You can put this solution on YOUR website!If you are traveling 140 MPH, how far would you travel in one second? ----- 1 hour = 3600 seconds --> 140/3600 miles = 7/180 miles/second
 Complex_Numbers/615746: What is the magnitude of the complex number 3+4i? Thank you!1 solutions Answer 387300 by Alan3354(31487)   on 2012-05-29 09:43:41 (Show Source): You can put this solution on YOUR website!What is the magnitude of the complex number 3+4i? Thank you! --------- The Mag of
 Surface-area/615578: what is the surface area of a sphere with a radius of 4.7 feet?1 solutions Answer 387247 by Alan3354(31487)   on 2012-05-28 20:24:46 (Show Source): You can put this solution on YOUR website!what is the surface area of a sphere with a radius of 4.7 feet? ---------