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Alan3354 answered: 31497 problems
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Polynomials-and-rational-expressions/388951: Can someone help me solve Problem? 2x^3+8x^3+5 1 solutions Answer 275371 by Alan3354(31518)   on 2010-12-27 15:56:07 (Show Source): You can put this solution on YOUR website! There's nothing to be solved, it's not an equation. You can combine the 2 x^3 terms. =

Trigonometry-basics/388944: The expression sin 2A/2cos sqA is equivalent to a) cotA b) sinA c) tanA d) 2tanA Answer: c (Just checking to make sure that I did my HW correct) Thanks 1 solutions Answer 275370 by Alan3354(31518)   on 2010-12-27 15:54:47 (Show Source): You can put this solution on YOUR website! Do you mean sin(2A)/(2cos^2(A)) ??? ------------- If so, it is the tan(A)

Polynomials-and-rational-expressions/386843: simplify the square root of 4xto the 2nd power 1 solutions Answer 275369 by Alan3354(31518)   on 2010-12-27 15:49:28 (Show Source): You can put this solution on YOUR website! If it's then ------------- If it's then = 4x

test/388796: determine the mass flow rate of fuel from the gasoline tank to the car fuel injenction system.Assume that the gasoline consumption of the car is 20 mpg when the car is moving at 60 mph.Use the specifi gravity value of 0.72 for the gasoline ? 1 solutions Answer 275368 by Alan3354(31518)   on 2010-12-27 15:44:33 (Show Source): You can put this solution on YOUR website! 60 mph = 1 mile/minute 20 mpg = 1/20 gallon per mile = 0.05 gal/minute 1 gallon =~ 232 cubic inches = 3802 cc 0.05 * 3802 * 0.72 = 136.86 grams/minute

Pythagorean-theorem/388931: the square of the hypotenuse of this triangle is 400 cm. Determine the actual measures of the hypotenuse and sides a and b of this right triangle. 1 solutions Answer 275362 by Alan3354(31518)   on 2010-12-27 15:10:49 (Show Source): You can put this solution on YOUR website! the square of the hypotenuse of this triangle is 400 cm. Determine the actual measures of the hypotenuse and sides a and b of this right triangle ---------------- Insufficient info. It could be 20, 16 & 12, or 20, 10 and sqrt(300), or any of an ifinite # of combinations.

Evaluation_Word_Problems/388928: How do i factor -x^4+x^3+8x^2-12x 1 solutions Answer 275360 by Alan3354(31518)   on 2010-12-27 15:06:54 (Show Source): You can put this solution on YOUR website! Divide out x or -x. 12 is the last term, so sub ± 1, 2, 3 & 4 for x and see if the polynomial is zero. If +1 makes it zero, then (x-1) is a factor, etc --------- If you find a factor, divide by it, then you have a quadratic left.

Pythagorean-theorem/388930: the hypotenuse of this triangle is 17 meters. if there are no decimal answers, what would the actual measures of sides a and b have to be? 1 solutions Answer 275356 by Alan3354(31518)   on 2010-12-27 14:47:24 (Show Source): You can put this solution on YOUR website! 8 & 15 meters

Travel_Word_Problems/388922: If it takes 8 hours to drive 496 miles, what is the speed limit all the way there? 1 solutions Answer 275355 by Alan3354(31518)   on 2010-12-27 14:46:30 (Show Source): You can put this solution on YOUR website! There's no connection between the average speed of 62 mph and the speed limit.

Volume/388919: If a right circular cone has radius of 9 and height of 12, what is its volume in terms of pi? 1 solutions Answer 275353 by Alan3354(31518)   on 2010-12-27 14:42:44 (Show Source): You can put this solution on YOUR website! Sub 9 for r, and 12 for h.

Pythagorean-theorem/388916: A sq. + B sq. = 2304 Right Triangle 1 solutions Answer 275338 by Alan3354(31518)   on 2010-12-27 12:32:01 (Show Source): You can put this solution on YOUR website! Lower case is used for sides, CAPs for angles. -------------- Do you have a question?

Angles/388914: Pete is designing a company logo by dividing a circle into five equal pie-shaped sections. How many degrees are in angle A? Angle A from one of the pieces and the radius of the circle is 10 inches. 1 solutions Answer 275337 by Alan3354(31518)   on 2010-12-27 11:57:36 (Show Source): You can put this solution on YOUR website! If angle A is at the center, it's 360/5 = 72º = 2pi/5 radians If it's somewhere else, you'll have to provide more info.

Triangles/388913: find the third side of a triangle from these data: 1) two side of equal length of 2700 miles; 2) the side are separated by 1 degree. 3) what is the length of the 3rd. side? 4) what is the formula to solve the problem? 1 solutions Answer 275329 by Alan3354(31518)   on 2010-12-27 10:54:05 (Show Source): You can put this solution on YOUR website! This was done 1-2 days ago. --------- The bisector of the 1º gives 2 right triangles. 1/2 the 3rd side = 2700*sin(0.5º) =~ 23.5616 miles x2 =~ 47.12 miles --------------------- Or, use the Cosine Law: s^2 = 2700^2 + 2700^2 - 2*2700*2700*cos(1º) Same answer. -------------- PS There is "a formula" to solve this problem, but it's the "hard way" to do it. Many problems don't have a formula, you have to figure them out.

testmodule/388845: A man is surveing the landscape at a spot where his eyes are 10,Om above the sea level. In the sky there is a tiny purple cloud, the inclination of which is 62°above the horizon. The reflection of the cloud from the surface of the sea has an inclination, which is 65° below the horizon. Find the height of the cloud above the sea level. Hint: The angles, which the source and reflection form with the surface of the sea, are the same I REALLY CANT FIND WHERE IS THE MISSING PART 1 solutions Answer 275319 by Alan3354(31518)   on 2010-12-27 09:37:07 (Show Source): You can put this solution on YOUR website! A sketch is needed. email me via the thank you note, and I'll send it.

Trigonometry-basics/388837: 1) What is the value of sin (Arc cos 1/x)? a) sqrt1-xsq/x b) sqrt1+xsq/x c) x/sqrt xsq+1 d) sqrt xsq-1/x Answer : a Thanks 1 solutions Answer 275266 by Alan3354(31518)   on 2010-12-26 19:37:59 (Show Source): You can put this solution on YOUR website! What is the value of sin (Arc cos 1/x)? a) sqrt1-xsq/x b) sqrt1+xsq/x c) x/sqrt xsq+1 d) sqrt xsq-1/x ------------------ Use a circle of radius x The side adjacent = 1 cos = 1/x The side opposite = sqrt(x^2 - 1) sin = sqrt(x^2 - 1)/x ------------------

Distributive-associative-commutative-properties/388846: determine whether (-4,5) is a solution of 4x + 8y=1. is(-4,5) a solution to the equation? yes or no 1 solutions Answer 275252 by Alan3354(31518)   on 2010-12-26 16:09:20 (Show Source): You can put this solution on YOUR website! determine whether (-4,5) is a solution of 4x + 8y=1. --------- Sub -4 for x and 5 for y. See if it = 1.

Parallelograms/388818: ABCD is a parallelogram.solve for x and find the lengths of BC and AD? 1 solutions Answer 275227 by Alan3354(31518)   on 2010-12-26 11:32:00 (Show Source): You can put this solution on YOUR website! Not enough info.

Square-cubic-other-roots/388814: what is the complete solution of the squareroot of 78? 1 solutions Answer 275223 by Alan3354(31518)   on 2010-12-26 08:59:56 (Show Source): You can put this solution on YOUR website! complete? = ± 8.831760866...

Polynomials-and-rational-expressions/388809: Can someone help me solve this problem The polynomial 0.041h-0.018a-2.69 can’t be used to estimate capacity in liters, of a female with height h, and age a, in years. Find the lung capacity of a 60-year-old woman who is 150 centimeters tall. Her lung capacity if approximately________ liters. 1 solutions Answer 275222 by Alan3354(31518)   on 2010-12-26 08:58:19 (Show Source): You can put this solution on YOUR website! If you can't use that, what do you use?

test/388797: if an astronut and her space suit weight 250 IB on earth what should be the volume of her suit if she is to practice for weightlee condition in an underwater netural buoyant simulator ? 1 solutions Answer 275221 by Alan3354(31518)   on 2010-12-26 08:57:02 (Show Source): You can put this solution on YOUR website! She'll have to displace 250 pounds of water. Water is 1 gram per cc. 250 pounds = 4000 ounces =~ 113600 grams --> 113600 cc = 113.6 liters

logarithm/388812: express as single logarithm: log5 - log x - log y 1 solutions Answer 275220 by Alan3354(31518)   on 2010-12-26 08:44:52 (Show Source): You can put this solution on YOUR website! duplicate

Travel_Word_Problems/388782: who do you work those out 1 solutions Answer 275197 by Alan3354(31518)   on 2010-12-25 20:33:23 (Show Source): You can put this solution on YOUR website! Very well, usually.

Triangles/388789: here is the problem: a triangle has 2 sides of equal length (2700 miles) separated by 1 degree. what is the length of the 3rd side? How is this equation solved? 1 solutions Answer 275195 by Alan3354(31518)   on 2010-12-25 20:25:24 (Show Source): You can put this solution on YOUR website! The altitude from the 1º gives 2 right triangles. The 3rd side = 2*2700*sin(0.5º) =~ 47.12 miles

Bodies-in-space/388010: A solid cylindrical stone pillar has a top in the shape of a hemisphere. Given that the pillar is 40 cm in diameter and has the same mass as a solid stone sphere of the same material, with radius 40 cm. Find the height of the pillar. 1 solutions Answer 275185 by Alan3354(31518)   on 2010-12-25 18:04:00 (Show Source): You can put this solution on YOUR website! A solid cylindrical stone pillar has a top in the shape of a hemisphere. Given that the pillar is 40 cm in diameter and has the same mass as a solid stone sphere of the same material, with radius 40 cm. Find the height of the pillar. ------------------ The same material and the same weight --> same volume. ------------- The volume of the sphere = V = 256000pi/3 cc ------------ For the cylinder: pi*40*(40h + 2*1600/3) = 256000pi/3 1600h + 12800/3 = 256000/3 4800h = 12800 = 256000 48h = 2432 h = 50.333 cm for the cylindrical part height overall = 50.333 + r = 90.333 cm

Polynomials-and-rational-expressions/387437: (1/2x + 4) (1/2x - 4) (4x - 8) 1 solutions Answer 275173 by Alan3354(31518)   on 2010-12-25 14:16:06 (Show Source): You can put this solution on YOUR website! (1/2x + 4) (1/2x - 4) (4x - 8) = =

Quadratic_Equations/388764: S^2+S+6 1 solutions Answer 275172 by Alan3354(31518)   on 2010-12-25 14:06:36 (Show Source): You can put this solution on YOUR website! Do you have a question?

Quadratic_Equations/388765: S^2+S+6 then how to solve in (S-S1)(S-S2) 1 solutions Answer 275171 by Alan3354(31518)   on 2010-12-25 14:05:14 (Show Source): You can put this solution on YOUR website! It's not an equation, so there's nothing to solve.

logarithm/387986: Convert the following equations into logarithmic form: a. 2 = 6x b. 7 = 6y c. 9 = 3y d. X = 8y 1 solutions Answer 275170 by Alan3354(31518)   on 2010-12-25 14:03:45 (Show Source): You can put this solution on YOUR website! No exponents are given ???

Graphs/387358: Given the linear equation y=-2/3x+1, find the y-coordinates of the points (-6, ), (-3, ), and (3, ). Please show all of your work. Plot those points and graph the linear equation. 1 solutions Answer 275168 by Alan3354(31518)   on 2010-12-25 13:17:39 (Show Source): You can put this solution on YOUR website! Given the linear equation y=-2/3x+1, find the y-coordinates of the points (-6, ), (-3, ), and (3, ). Please show all of your work. Plot those points and graph the linear equation. ------------------ Assuming you mean y=(-2/3)x+1 and not -2/(3x) + 1 or -2/(3x+1): y=(-2/3)x+1 Sub 6 for x and find y y = (-2/3)*6 + 1 = -3 --> (6,-3) --------- x = -3: y = 2 + 1 = 3 --> (-3,3) ------------ do the same for x = 3 --------- Plot the points, draw a line thru them.

Money_Word_Problems/388705: how much money will you have in ten years if you save $10.00 per week in a savings account that pays 1.50% interest 1 solutions Answer 275167 by Alan3354(31518)   on 2010-12-25 13:10:42 (Show Source): You can put this solution on YOUR website! $5648.90 if compounded annually ---------- Without interest, it would be $5200.

Rational-functions/387349: a. The point on the x-axis that is equidistant (equal distance) from (8,4) and (-4,2) b. The distance between the points (8,2) and (16,2). 8 c. The distance between the points (2,6) and (12,8).2 d. The midpoint between (8,2) and (10,6). e. The midpoint between (-4, 2) and (-5, 3). 1 solutions Answer 275166 by Alan3354(31518)   on 2010-12-25 13:02:31 (Show Source): You can put this solution on YOUR website! a. The point on the x-axis that is equidistant (equal distance) from (8,4) and (-4,2) The point will be (x,0) Use d squared, since it will be equal if d is = 76 - 16x = 16 + 8x 60 = 24x x = 2.5 ---> (2.5,0) --------------- b. The distance between the points (8,2) and (16,2). 8 8 is right. ----------- c. The distance between the points (2,6) and (12,8).2 How did you get 2? d=~ 10.198 units ---------------- d. The midpoint between (8,2) and (10,6) Find the average of x and y separately x: (8 + 10)/2 = 0 y: (2 + 6)/2 = 4 --> (0,4) ----------- e. The midpoint between (-4, 2) and (-5, 3) Same method as d --> (-4.5,2.5)

Evaluation_Word_Problems/388763: If a flagpole is 16 meters from the center of a long straight hedge, how many trees can be planted so that each tree is exactly 20 meters from the flagpole and 4 meters from the centre line of the hedge? 1 solutions Answer 275165 by Alan3354(31518)   on 2010-12-25 12:39:11 (Show Source): You can put this solution on YOUR website! 2