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# Recent problems solved by 'Alan3354'

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 Problems-with-consecutive-odd-even-integers/587366: The product of two consecutive negative odd integers is 899. What is the value of the two integers?1 solutions Answer 374100 by Alan3354(31487)   on 2012-03-15 16:11:03 (Show Source): You can put this solution on YOUR website!The product of two consecutive negative odd integers is 899. What is the value of the two integers? ------------ = almost 30, the center --> 29 & 31
 Rectangles/587368: If the area of a rectangle is 59 units what would the Length and width be if it has to be a whole number1 solutions Answer 374096 by Alan3354(31487)   on 2012-03-15 16:08:51 (Show Source): You can put this solution on YOUR website!If the area of a rectangle is 59 units what would the Length and width be if it has to be a whole number ----------- The only factors of 59 are 1 & 59 ---> 1 by 59
 Travel_Word_Problems/587376: It takes you 1 1/2 hours to jog 12 miles. What is your average speed in miles per hour?1 solutions Answer 374094 by Alan3354(31487)   on 2012-03-15 16:07:40 (Show Source): You can put this solution on YOUR website!It takes you 1 1/2 hours to jog 12 miles. What is your average speed in miles per hour? ----------- d = r*t r = d/t
 Volume/587351: a box is shaped like a rectangular prism.What happens to the volume of the box if you double the length of each edge of the box?1 solutions Answer 374076 by Alan3354(31487)   on 2012-03-15 15:22:11 (Show Source): You can put this solution on YOUR website!a box is shaped like a rectangular prism.What happens to the volume of the box if you double the length of each edge of the box? ------- Vol = L*W*H New Vol = 2L*2W*2H = 8 times the volume
 Exponential-and-logarithmic-functions/587356: which of the following shows log27 9=2/3 correctly written in exponential form?1 solutions Answer 374074 by Alan3354(31487)   on 2012-03-15 15:17:47 (Show Source): You can put this solution on YOUR website!which of the following shows log27 9=2/3 correctly written in exponential form? ---------- Nothing follows. Remember the log is the exponent. The base here is 27 --> ------- It doesn't show well, but the exponent is 2/3.
 Sequences-and-series/587333: i dont even know where to start with this problem. -1 < (9-12x)/7 < 8 1 solutions Answer 374072 by Alan3354(31487)   on 2012-03-15 14:52:57 (Show Source): You can put this solution on YOUR website!i dont even know where to start with this problem. -1 < (9-12x)/7 < 8 -------------- Why not multiply everything by 7?
 Volume/587319: find the radius of asphere with the following volume a)972picm^3 b)498pimm^3 c)15 3/16pi m^31 solutions Answer 374064 by Alan3354(31487)   on 2012-03-15 14:00:25 (Show Source): You can put this solution on YOUR website!find the radius of asphere with the following volume a)972picm^3 b)498pimm^3 c)15 3/16pi m^3 ========================== Do them like this: 1. 10 in^3 Solve for r r =~ 1.3365 inches ------------------- You can do that for each one, or do it once and plug in the volumes. You can make an Excel sheet to do them, too. Make it once, it works forever. ------ Solve for r inches ---------------- ---------------- 2. 20 ft^3 3. 0.45 cm^3 4. 0.002 mm^3
 Points-lines-and-rays/587290: Write the equation for the vertical line that contains point E(10, –3). 1 solutions Answer 374049 by Alan3354(31487)   on 2012-03-15 12:02:24 (Show Source): You can put this solution on YOUR website!Write the equation for the vertical line that contains point E(10,–3). --------- "Vertical" usually means parallel to the y-axis. The line is always the same distance from the y-axis, which is the x value. --> x = 10 ----------- For all values of y, x = 10 It goes thru the points (10,-3), (10,3), (10,3333), (10,y) etc
 Polynomials-and-rational-expressions/587256: (w3 + 64) ÷ (4 + w) a. w² - 4w - 16 b. w² + 4w - 16 c. w² - 4w + 16 1 solutions Answer 374048 by Alan3354(31487)   on 2012-03-15 11:53:03 (Show Source): You can put this solution on YOUR website!(w3 + 64) ÷ (4 + w) a. w² - 4w - 16 b. w² + 4w - 16 c. w² - 4w + 16 -------------- You can try each answer, see which is correct, if any. Or, divide and see what that answer is. ----------- Look at the sum of 2 cubes:
 Surface-area/587280: what is the surface area of a cylinder with 3 foot radius and a 10 fooheight 1 solutions Answer 374047 by Alan3354(31487)   on 2012-03-15 11:49:40 (Show Source): You can put this solution on YOUR website!what is the surface area of a cylinder with 3 foot radius and a 10 fooheight ---------------- The area of each end is The lateral area is
 Triangles/587291: An Isosceles tringle with base 10 and perimeter 36?1 solutions Answer 374045 by Alan3354(31487)   on 2012-03-15 11:48:11 (Show Source): You can put this solution on YOUR website!An Isosceles tringle with base 10 and perimeter 36? ----------- what about it?
 Volume/587255: A right cylinder has a radious of 6 inches and a heigh of 8 inches i want to find the lateral area of the cylinder1 solutions Answer 374040 by Alan3354(31487)   on 2012-03-15 11:23:21 (Show Source): You can put this solution on YOUR website!A right cylinder has a radious of 6 inches and a heigh of 8 inches i want to find the lateral area of the cylinder ---------- sq inches
 Problems-with-consecutive-odd-even-integers/587243: What is the slope of the line tangent to the curve 3y^2-2x^2=6-2xy at the point (3,2)?1 solutions Answer 374039 by Alan3354(31487)   on 2012-03-15 09:51:54 (Show Source): You can put this solution on YOUR website!What is the slope of the line tangent to the curve 3y^2-2x^2=6-2xy at the point (3,2)? ------------ 3y^2-2x^2=6-2xy 6ydy - 4xdx = -2(xdy + ydx) = -2xdy - 2ydx 6ydy + 2ydy = -2ydx + 4xdx 4ydy = (2x - y)dx dy/dx = (2x - y)/4y ---------------------- f'(3,2) = (6 - 2)/(4*2) = 1/2 Tangent line: 2y = x + 1
 Problems-with-consecutive-odd-even-integers/587246: What is the area of the quadrilateral with vertices A(0,2), B(15,10), C (15,2), & D(0,-18)?1 solutions Answer 374038 by Alan3354(31487)   on 2012-03-15 09:25:19 (Show Source): You can put this solution on YOUR website!What is the area of the quadrilateral with vertices A(0,2), B(15,10), C (15,2), & D(0,-18)? ------------- Make a matrix, 2 by P, the number of points, repeat the first point. A...B...C...D...A 0..15..15...0...0 2..10...2..-18..2 --------------------- Add the diagonal products starting at the upper left: 0 + 30 - 270 + 0 = -240 Add the diagonal products starting at the lower left: 30 + 150 + 0 + 0 = 180 -------- The area is 1/2 the ABS of the difference |-240 - 180| = 420 Area = 210 sq units. ---------------------- It works for all polygons, any number of sides.
 Circles/587192: The flight path of Charlie's plane is (x-12)^2+(y-4)^2=9 and the flight path of Jackie's plane is (x-17)^2 + (y-5)^2 = 4. If Charlie and Jackie are flying their planes at the same altitude, is it likely that the planes will collide at some time? Justify your response, clearly stating any assumptions.1 solutions Answer 374036 by Alan3354(31487)   on 2012-03-15 08:01:26 (Show Source): You can put this solution on YOUR website!The flight path of Charlie's plane is (x-12)^2+(y-4)^2=9 and the flight path of Jackie's plane is (x-17)^2 + (y-5)^2 = 4. If Charlie and Jackie are flying their planes at the same altitude, is it likely that the planes will collide at some time? Justify your response, clearly stating any assumptions. ------------- Their flight paths don't intersect, no collision. They are 2 circles. If you find the difference between the centers, you see it's greater than the sum of their radii --> no intersection. --------
 test/587218: Convert the numeral to a numeral in the base indicated. 16,629 to base 131 solutions Answer 374035 by Alan3354(31487)   on 2012-03-15 07:58:35 (Show Source): You can put this solution on YOUR website!16,629 to base 13 ----------- 13^3 = 2197 16629/2197 = 7 + remainder rem = 1250 1250/169 = 7 + rem 67 67 = 5*13 + 2 --> 7752
 Numbers_Word_Problems/587096: If the sum of two consecutive even integers is 78, find the integers.?1 solutions Answer 373981 by Alan3354(31487)   on 2012-03-14 22:12:53 (Show Source): You can put this solution on YOUR website!If the sum of two consecutive even integers is 78, find the integers.? ----------- 78/2 = 39, the middle --> 38 & 40
 Square-cubic-other-roots/587001: can you help me work through this problem? cubed root of 81 minus the cubed root of 24 Thank you so much!!1 solutions Answer 373958 by Alan3354(31487)   on 2012-03-14 19:28:51 (Show Source): You can put this solution on YOUR website!cubed [sic] root of 81 minus the cubed [sic] root of 24 ------------ It's cube root. ---------- = = =
 Polygons/586959: i need help with solving polygons.1 solutions Answer 373956 by Alan3354(31487)   on 2012-03-14 19:14:45 (Show Source): You can put this solution on YOUR website!i need help with solving polygons. ---------- Polygons are not solved. Equations are solved.
 Matrices-and-determiminant/586999: Identify the solution to the system of equations. 3x-y=0 4x+2y=1 a.)(-1/2, 3/2) b.)(1/10, 3/10) c.)(1/9, 1/3) d.)no solution1 solutions Answer 373955 by Alan3354(31487)   on 2012-03-14 19:11:32 (Show Source): You can put this solution on YOUR website!Identify the solution to the system of equations. 3x-y=0 4x+2y=1 a.)(-1/2,3/2) b.)(1/10,3/10) c.)(1/9,1/3) d.)no solution -------------------- You have 3 choices, you can try each one and see if it works. Sub the values for x & y, and see what works. ----------- The alternative is to solve the system, which would be more instructive.
 Numeric_Fractions/586969: Demuestre Que Los Puntos (1,-3),(3,2)y(-2,4)Son Los Vértices De Un Triangulo Isósceles. 1 solutions Answer 373954 by Alan3354(31487)   on 2012-03-14 19:02:54 (Show Source): You can put this solution on YOUR website!Demuestre Que Los Puntos (1,-3),(3,2)y(-2,4)Son Los Vértices De Un Triangulo Isósceles. ---------- find the length of the 3 sides. If 2 are equal, it's isoceles.
 Polynomials-and-rational-expressions/586995: 27y squared - 48y to the fourth power 1 solutions Answer 373953 by Alan3354(31487)   on 2012-03-14 18:57:27 (Show Source): You can put this solution on YOUR website!27y squared - 48y to the fourth power ================== What about it?
 �t�e�s�t/586989: how do you do Pythagorean Theorem with diagonals 1 solutions Answer 373952 by Alan3354(31487)   on 2012-03-14 18:56:47 (Show Source): You can put this solution on YOUR website!how do you do Pythagorean Theorem with diagonals ----------- Same as any Pythagorean Theorem application.
 Radicals/586965: The formula for the volume of a sphere is V=4/3πr^3. Find the radius of a sphere with each volume. 1. 10 in^3 2. 20 ft^3 3. 0.45 cm^3 4. 0.002 mm^3 I tried doing the problems like this: 10/4/3π; it's not the right way, but I don't know how. It has to be answered as a radical expression. How do I do that?1 solutions Answer 373950 by Alan3354(31487)   on 2012-03-14 18:26:57 (Show Source): You can put this solution on YOUR website!The formula for the volume of a sphere is V=4/3πr^3. Find the radius of a sphere with each volume. 1. 10 in^3 Solve for r r =~ 1.3365 inches ------------------- You can do that for each one, or do it once and plug in the volumes. You can make an Excel sheet to do them, too. Make it once, it works forever. ------ Solve for r inches ---------------- ---------------- 2. 20 ft^3 3. 0.45 cm^3 4. 0.002 mm^3 I tried doing the problems like this: 10/4/3π; it's not the right way, but I don't know how. It has to be answered as a radical expression. How do I do that?
 Quadratic-relations-and-conic-sections/586749: does the following parabola open down because it is negative or up because the x is squared? y = -2x^2 + 5x - 21 solutions Answer 373867 by Alan3354(31487)   on 2012-03-14 09:45:53 (Show Source): You can put this solution on YOUR website!does the following parabola open down because it is negative or up because the x is squared? y = -2x^2 + 5x - 2 ----------- The coefficient of the x^2 term is negative --> opens downward If it's positive, it opens upward. ----------- If it's a parabola, it will be Ax^2 + Bx + C = 0
 Exponential-and-logarithmic-functions/586750: how do i solve: log base 2 8 (log2 8)1 solutions Answer 373865 by Alan3354(31487)   on 2012-03-14 09:42:27 (Show Source): You can put this solution on YOUR website!how do i solve: log base 2 8 (log2 8) ------- If you mean = = = ----------------- For a numerical answer: = log(24)/log(2) =~ 4.58496
 t e s t/586732: The sum of two nonnegative numbers is 9. Find these two numbers knowing that the product of one number and the square of the other number is a maximum.1 solutions Answer 373862 by Alan3354(31487)   on 2012-03-14 09:37:05 (Show Source): You can put this solution on YOUR website!The sum of two nonnegative numbers is 9. Find these two numbers knowing that the product of one number and the square of the other number is a maximum. ----------- P = x^2*(9-x) = 9x^2-x^3 f'(x) = -x*(x-6) = 0 --> x = 0, x = 6 ================ @ x=6, max value = 3*6^2 = 108
 Travel_Word_Problems/586497: Hello I really have trouble in math please solve this and teach me The car drove 40mi/hr to work and drove back 20mi/hr to go home. How much was the total distance?1 solutions Answer 373792 by Alan3354(31487)   on 2012-03-13 20:55:15 (Show Source): You can put this solution on YOUR website!The car drove 40mi/hr to work and drove back 20mi/hr to go home. How much was the total distance? -------------- Not enough info. No times or distances are given.
 Proportions/586513: a car travels 220 mi. in 4 h.1 solutions Answer 373791 by Alan3354(31487)   on 2012-03-13 20:53:32 (Show Source): You can put this solution on YOUR website!a car travels 220 mi. in 4 h. ------------- Do you have a question?
 Exponents/586550: Multiplay and express in scientific notation. (5 x 10^6)(6 x 10^2) = 3.0 x 10 ?1 solutions Answer 373789 by Alan3354(31487)   on 2012-03-13 20:52:22 (Show Source): You can put this solution on YOUR website!Multiplay and express in scientific notation. (5 x 10^6)(6 x 10^2) = 3.0 x 10 ? ------------ (5 x 10^6)(6 x 10^2) = 30*10^8 =
 Surface-area/586535: What is the area if diameter=6in 1 solutions Answer 373788 by Alan3354(31487)   on 2012-03-13 20:51:05 (Show Source): You can put this solution on YOUR website!What is the area if diameter=6in ------- Diameter implies a circle r = d/2 = 3 inches