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Recent problems solved by 'Alan3354'

Alan3354 answered: 30934 problems
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expressions/260116: find the difference in elevation between 5,642 and -28 do I add or subtract the elevation -28m to or from the elevation______m 1 solutions Answer 191557 by Alan3354(30954)   on 2010-01-23 19:13:37 (Show Source): You can put this solution on YOUR website! You want the difference between -28 and 5642. You have to move 28 to get from -28 to zero. Then, another 5642 to get to 5642. So you add them. ---------------- Or, = 5642 - (-28) = 5642 + 28 = 5670

Linear-equations/260098: What is the x intercept for y= -3/4x+5. I have (6.75,0)which is wrong? 1 solutions Answer 191541 by Alan3354(30954)   on 2010-01-23 17:49:27 (Show Source): You can put this solution on YOUR website! What is the x intercept for y= -3/4x+5. I have (6.75,0)which is wrong? ------------- At the x-intercept, y = 0 -------- 0 = -(3/4)x + 5 3x/4 = 5 3x = 20 x = 20/3

percentage/260077: Nathan bought a set of in-line skates for $29.40. They were 25% off the original price. What was the original price? Draw a diagram to help solve the problem. 1 solutions Answer 191524 by Alan3354(30954)   on 2010-01-23 17:08:43 (Show Source): You can put this solution on YOUR website! Nathan bought a set of in-line skates for $29.40. They were 25% off the original price. What was the original price? Draw a diagram to help solve the problem. -------------- $29.40 is the remaining 75% after 25% off, = 3/4 of the original price. 29.40 = 0.75x x = 29.40/0.75 x = $39.20 ------------- I can't think of any diagrams that might help.

Linear-equations/260025: Write an equation of the line containing the given point and parallel to the given line. (4,-8); 4x-5y=4 1 solutions Answer 191493 by Alan3354(30954)   on 2010-01-23 15:26:45 (Show Source): You can put this solution on YOUR website! Do it like this one: ===================== A line and a point example. Write in standard form the eqation of a line that satisfies the given conditions. Perpendicular to 9x+3y=36, through (1,2) ----------------- Find the slope of the line. Do that by putting the equation in slope-intercept form, y = mx + b. That means solve for y. 9x+3y = 36 3y= - 9x + 36 y = -3x + 13 The slope, m = -3 ------------------ The slope of lines parallel have the same slope. The slope of lines perpendicular is the negative inverse, m = +1/3 ---------------- Use y = mx + b and the point (1,2) to find b. 2 = (1/3)*1 + b b = 5/3 The equation is y = (1/3)x + 5/3 (slope-intercept form) x - 3y = -5 (standard form) ------------------------ For further assistance, or to check your work, email me via the thank you note.

Reduction-of-unit-multipliers/260048: how who u go about sloving 40 centimeters per second to miles per hour. and 1000 cubic centimeters to cubic feet 1 solutions Answer 191477 by Alan3354(30954)   on 2010-01-23 14:25:51 (Show Source): You can put this solution on YOUR website! how who u go about sloving 40 centimeters per second to miles per hour. and 1000 cubic centimeters to cubic feet --------- It's not solving, it's converting. 1 inch = 2.54 cm exactly -------- 40 cm/sec = 40*60*60 cm/hour = 144000cm/hour = 144000/2.54 inch/hour = (144000/2.54)/(12*5280) miles/hr =~ 0.89477 mph ---------------- 1000 cc/(2.54*2.54*2.54) = cubic inches = (1000/2.54^3)/12^3 cubic ft =~ 0.0353 ft^3

Graphs/260047: i need to graph 5x^2+3y=37 i know in order to graph it i need to isolate Y into Y=____ but i dont know how to go about that this is as far as i got 3y=-5x^2+37 but i dont know how to get the 3 away from y 1 solutions Answer 191476 by Alan3354(30954)   on 2010-01-23 14:19:37 (Show Source): You can put this solution on YOUR website! i need to graph 5x^2+3y=37 i know in order to graph it i need to isolate Y into Y=____ but i dont know how to go about that this is as far as i got 3y=-5x^2+37 but i dont know how to get the 3 away from y ----------- Divide both sides by 3 y = (5/3)x^2 + 37/3

Travel_Word_Problems/260028: How far will you drive if you drive 3 hours at 63 miles per hour? 1 solutions Answer 191465 by Alan3354(30954)   on 2010-01-23 12:11:18 (Show Source): You can put this solution on YOUR website! You have 2 numbers to work with. What would you guess?

Distributive-associative-commutative-properties/260026: How do solve step by step x^2=40? I am suppposed to solve the equation. Thanks 1 solutions Answer 191462 by Alan3354(30954)   on 2010-01-23 11:58:52 (Show Source): You can put this solution on YOUR website! There aren't many steps. x^2 = 40 x = +sqrt(40) = +2sqrt(10) x = -sqrt(40) = -2sqrt(10) --------------------------- Use a calculator, --> x =~ 6.324555

Equations/260020: Is there a trick to factoring cubed or higher equations 1 solutions Answer 191458 by Alan3354(30954)   on 2010-01-23 11:28:55 (Show Source): You can put this solution on YOUR website! no. There's no "trick" or procedure for the general case, but some are commonly known. ---------- a^3 + b^3 = (a+b)*(a^2 - ab + b^2) a^3 - b^3 - (a-b)*(a^2 + ab + b^2) ---------------------------------- The difference of any 2 even powered exponents (a^2n - b^2n) can be factored. The sum or difference of any 2 odd powered exponents can be factored. can be factored.

Graphs/259987: identify the x and y intercepts 4x-5y=20 1 solutions Answer 191450 by Alan3354(30954)   on 2010-01-23 10:55:57 (Show Source): You can put this solution on YOUR website! identify the x and y intercepts 4x-5y=20 ----------------- The y-intercept is at x=0, and v.v. 4x-5y=20 -5y=20 y = -4 --> (0,-4) ----------------- 4x-5y=20 4x=20 x = 5 --> (5,0)

Length-and-distance/259888: graph= -4/3x+8 and y=2/3x-4 and find area of figure 1 solutions Answer 191444 by Alan3354(30954)   on 2010-01-23 10:42:50 (Show Source): You can put this solution on YOUR website! Assuming the 1st eqn is y=(-4/3)x + 8 The graphs give you 2 straight lines. They don't enclose an area.

Volume/260003: What is the volume of a box which measures 2cm deep, 20cm long and 10cm high? 1 solutions Answer 191440 by Alan3354(30954)   on 2010-01-23 10:28:40 (Show Source): You can put this solution on YOUR website! It's the product of the dimensions, 2*20*10 cc

Triangles/259914: 1.two sides of a triangle are 10 and 20. Give all the values that the third side c can take i.e find x and y such that x1 solutions Answer 191371 by Alan3354(30954)   on 2010-01-22 21:21:30 (Show Source): You can put this solution on YOUR website! The 3rd side has to be >10 and <30. >(20 - 10) and <(20 + 10)

test/258605: what is six less than the number of cars is 9? 1 solutions Answer 191368 by Alan3354(30954)   on 2010-01-22 21:15:08 (Show Source): You can put this solution on YOUR website! It's a question about cars.

test/259906: Factor 9y^2 – 12y + 4 1 solutions Answer 191367 by Alan3354(30954)   on 2010-01-22 21:14:07 (Show Source): You can put this solution on YOUR website! Did you try it? The 1st term is (3y)^2. The last term is 2^2.

Polynomials-and-rational-expressions/259907: how do you divide 1 solutions Answer 191366 by Alan3354(30954)   on 2010-01-22 21:13:29 (Show Source): You can put this solution on YOUR website! Very well. Thx for asking.

test/259909: Factor 8 b^5c – 8 b^4c^2 +2b^3c^3 1 solutions Answer 191365 by Alan3354(30954)   on 2010-01-22 21:12:59 (Show Source): You can put this solution on YOUR website! Did you try it? Do you see any common factors? 2? b? c?

Geometry_Word_Problems/259881: The hypotenuse of an isosceles right triangle measures 15 feet. Find the area. 1 solutions Answer 191363 by Alan3354(30954)   on 2010-01-22 21:10:15 (Show Source): You can put this solution on YOUR website! 15^2 = 2s^2 Area = s^2/2 = 225/4 Area = 56.25 sq feet

Geometric_formulas/244366: A fifty pound play sand will fill approximately1/2 cubit foot I want to fill it 3/4 high how many whole bags of sand will I need to purchase? 1 solutions Answer 191345 by Alan3354(30954)   on 2010-01-22 19:52:16 (Show Source): You can put this solution on YOUR website! That depends on how big "it" is.

Expressions-with-variables/259887: solve by the substitution method and then two ordered pairs! 9x-9y=-9 3x+13=y 1 solutions Answer 191344 by Alan3354(30954)   on 2010-01-22 19:50:54 (Show Source): You can put this solution on YOUR website! solve by the substitution method and then two ordered pairs! 9x-9y=-9 --> 3x-3y = -3 --> 3x = 3y-3 3x+13=y --------- Sub for 3x into the 2nd eqn 3y-3 + 13 = y 3y+10 = y 2y = -10 y = -5 x = -6 -------- The only ordered pair of the solution is (-6,-5) ------------ PS Most people would have subbed for y into the 1st eqn, but that's not the only way to do it.

Equations/259868: The sum of three consecutive even integers is 228. Find the integers. 1 solutions Answer 191340 by Alan3354(30954)   on 2010-01-22 19:18:16 (Show Source): You can put this solution on YOUR website! 228/3 = 76. That's the middle number. --> 74, 76, 78 ---------------- There are more complicated ways to do it, but what's the point?

Geometry_proofs/259829: Explain how to construct a line parallel to a given line. Tell which theorem or postulate you use. 1 solutions Answer 191333 by Alan3354(30954)   on 2010-01-22 18:22:38 (Show Source): You can put this solution on YOUR website! Do you mean drawing a line? Or finding an equation of a line?

Geometric_formulas/259590: Carlos leaves Los Angeles on a cross-country car trip at 8:00 a.m. He averages 50 miles per hour. Juanita plans to take exactly the same route, but does not leave until 9:00 a.m. She averages 60 miles per hour. Develop a diagram or table to determine at what time Juanita will pass Carlos. 1 solutions Answer 191332 by Alan3354(30954)   on 2010-01-22 18:13:15 (Show Source): You can put this solution on YOUR website! In 1 hour, from 0800 to 0900, Carlos has gone 50 miles. Juanita gains on him at 10 mph (60-50). She will pass him in 5 hours (50/10). 0900 + 500 = 1400, or 2 PM. -------------- I see no need for a diagram or a table.

Equations/259839: Please help me simplify this equation: (5x+7y)-(3x-5y) 1 solutions Answer 191305 by Alan3354(30954)   on 2010-01-22 16:52:25 (Show Source): You can put this solution on YOUR website! It's not an equation, there's no equal sign. (5x+7y)-(3x-5y) You can combine the x's and the y's = 2x + 12y That's all that can be done.

Quadratic_Equations/259841: How do I solve the qauadratic equation -4x²=0.....I am really confused! Thank you in advance 1 solutions Answer 191304 by Alan3354(30954)   on 2010-01-22 16:50:39 (Show Source): You can put this solution on YOUR website! -4x^2 = 0 x^2 = 0 x = 0

Miscellaneous_Word_Problems/259789: A rectangle is placed inside a circle of radius r so the center of the rectangle and the center of the circle coincide, and the corners of the rectangle are on the circle. Express the area of the rectangle as a function of the length x of one of its sides. 1 solutions Answer 191289 by Alan3354(30954)   on 2010-01-22 15:55:20 (Show Source): You can put this solution on YOUR website! Consider one quadrant: x^2 + y^2 = r^2 y = sqrt(r^2 - x^2) Area = x*y Area = x*sqrt(r^2 - x^2) Total area = 4xsqrt(r^2 - x^2) --------------------- To use x as one side, not 1/2 of one side: Area = 2x*sqrt(4r^2 - x^2)

Linear-equations/259781: Im stuck on this question, can someone please help? Write an equation of a horizontal line passing through the two points (-2,-3) and (2,-3). Do not use any spaces in your answer. 1 solutions Answer 191275 by Alan3354(30954)   on 2010-01-22 15:12:49 (Show Source): You can put this solution on YOUR website! y=-3 --------- emailmeviathethankyounoteifyouhaveanyquestions.

Volume/259587: What is the volume of 1.0 liter expressed in mm3? 1 solutions Answer 191273 by Alan3354(30954)   on 2010-01-22 15:07:49 (Show Source): You can put this solution on YOUR website! What is the volume of 1.0 liter expressed in mm3? ---------------- Start with 1 liter = 1000 cc (cubic centimeters) 1 cm = 10 mm --> 1000 *10*10*10 = 1,000,000 mm^3 --------------- or, 1*10^6 mm^3 or, 1E6 mm^3 ---------------- It's a lot of zeroes, but it's better than multiplying by 1728.

Numeric_Fractions/259801: hello i'm in 4th grade grade.I'm trying to figure out how to solve this algebra problems..... 10+50=80- _____ and 90-30=20+ _____ please show me how to do this. Thank you 1 solutions Answer 191271 by Alan3354(30954)   on 2010-01-22 15:03:45 (Show Source): You can put this solution on YOUR website! 10+50=80- _____ Add the 10 and 50 60 = 80 - ? Subtract 60 from both sides 0 = 20 - ? The missing value is 20. -------------------------- and 90-30=20+ _____ Subtrace the 30 from 90 60 = 20 + ? Subtract 20 from both sides 40 = ? 40 is the missing value.

Linear-equations/259800: I need to figure out how to use point slope form to find the equation of the line with given properties and write the equation in general form. m= -7 passing through(3,0) = 21. thank you 1 solutions Answer 191269 by Alan3354(30954)   on 2010-01-22 15:00:23 (Show Source): You can put this solution on YOUR website! I need to figure out how to use point slope form to find the equation of the line with given properties and write the equation in general form. m= -7 passing through(3,0) = 21. I don't know what the 21 means ?? -------------- Do it like this one. ------------------------ The slope, m = -3 ---------------- Use y = mx + b and the point (1,2) to find b. 2 = (1/3)*1 + b b = 5/3 The equation is y = (1/3)x + 5/3 (slope-intercept form) x - 3y = -5 (standard form) ------------------------ For further assistance, or to check your work, email me via the thank you note.

Polygons/259797: An eight-point star-shaped polygon has a point angle of 36 degrees. What is the measure of its dent angle?. Also can you please show the work on how you came up with the solution? 1 solutions Answer 191266 by Alan3354(30954)   on 2010-01-22 14:56:29 (Show Source): You can put this solution on YOUR website! An eight-point star-shaped polygon has a point angle of 36 degrees. What is the measure of its dent angle?. Also can you please show the work on how you came up with the solution? ------------- 8 points --> 16 sides The total interior angles of a 16-gon = 180*(14) = 2520 degs 8 points * 36 = 288 degs 2520-288 = 2232 degs for the other 8 angles 2232/8 = 279 degs each