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# Recent problems solved by 'Alan3354'

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 test/432118: How to solve tan(cos^-1 sqrt3/2)?1 solutions Answer 299723 by Alan3354(30993)   on 2011-04-06 17:39:06 (Show Source): You can put this solution on YOUR website!It's not an equation, so there's nothing to solve. ------------------- If you want to evaluate it, tan(cos^-1 sqrt3/2) = tan(30 degs) = sqrt(3)/3 ---------------- = tan(330) = -sqrt(3)/3
 Coordinate-system/432100: y= x + 12 8x + 14y = 144 i have a multiple choice question and i cant figure out witch one is right because none of the answers match up (6,4,9,8)1 solutions Answer 299722 by Alan3354(30993)   on 2011-04-06 17:36:34 (Show Source): You can put this solution on YOUR website!y= x + 12 8x + 14y = 144 -------- Sub for y into the 2nd eqn 8x + 14(x+12) = 144 8x + 14x + 168 = 144 22x = -24 x = -12/11 ----------- y = -12/11 + 12 y = 120/11
 Polynomials-and-rational-expressions/432102: what is the answer for this? (7a^3+8a^2-2a)-(4a^3-3a^2-9a) 1 solutions Answer 299721 by Alan3354(30993)   on 2011-04-06 17:33:04 (Show Source): You can put this solution on YOUR website!It depends on the question.
 Systems-of-equations/432158: What is the equation for finding slope?1 solutions Answer 299720 by Alan3354(30993)   on 2011-04-06 17:32:11 (Show Source): You can put this solution on YOUR website!Slope, m = diffy/diffx Difference in y over difference in x.
 logarithm/432148: log(x-5)= log(x-2)+11 solutions Answer 299719 by Alan3354(30993)   on 2011-04-06 17:22:59 (Show Source): You can put this solution on YOUR website!log(x-5)= log(x-2)+1 log(x-5)= log(x-2) + log(10) log(x-5)= log((x-2)*10) x-5 = (x-2)*10 x-5 = 10x - 20 9x = 15 x = 5/3 ---------- x = 5/3 causes logs of negative numbers, tho. --> no solution
 test/432006: Slope=-1(-3,5)1 solutions Answer 299679 by Alan3354(30993)   on 2011-04-06 14:24:56 (Show Source): You can put this solution on YOUR website!What is your question?
 Rate-of-work-word-problems/432039: what is your favorite type of chicken 1 solutions Answer 299678 by Alan3354(30993)   on 2011-04-06 14:18:25 (Show Source): You can put this solution on YOUR website!Dead.
 Travel_Word_Problems/432026: If a car travels 40 miles in ˝ hour, what is its speed?1 solutions Answer 299668 by Alan3354(30993)   on 2011-04-06 13:10:06 (Show Source): You can put this solution on YOUR website!80 mph
 Exponential-and-logarithmic-functions/432025: What is t to the negative 4 power1 solutions Answer 299667 by Alan3354(30993)   on 2011-04-06 13:09:32 (Show Source):
 Expressions-with-variables/431964: Translate the following sentence into an equation. Do not solve. “Triple the difference of a number and fourteen is 60.” 1 solutions Answer 299666 by Alan3354(30993)   on 2011-04-06 13:08:53 (Show Source): You can put this solution on YOUR website!n is "the number" The difference can be n-14 or 14-n ------ 3(n-14) = 60 or 3(14-n) = 60
 Linear-equations/432017: 8-1/4>41 solutions Answer 299665 by Alan3354(30993)   on 2011-04-06 13:02:55 (Show Source): You can put this solution on YOUR website!If it's 8 - (1/4) > 4 then it's true. If it's (8-1)/4 > 4 it's not true.
 Linear-equations/431951: I would like to know did I do this correctly. email address is sowellsamantha@yahoo.com Ax + BY = C 3y = -9X -12 -3 -3 -3y = -9x -12 -3 -3 -3 In slope intercept form y = 3x + 4 Slope is (m) which equalizes m = 3 My next question is Assign coordinates for any two points: A( ..., ...) B( ..., ...). Calculate slope of line passing through these points. Find equation of this line in a form: y = mx + b 1 solutions Answer 299636 by Alan3354(30993)   on 2011-04-06 10:13:53 (Show Source): You can put this solution on YOUR website!I would like to know did I do this correctly. email address is sowellsamantha@yahoo.com Ax + BY = C 3y = -9X -12 -3 -3 -3y = -9x -12 -3 -3 -3 In slope intercept form y = 3x + 4 **** It's y = -3x - 4, just divide by 3 --------------------------------------- m = -3 ===================== Slope is (m) which equalizes m = 3 My next question is Assign coordinates for any two points: A( ..., ...) B( ..., ...). Calculate slope of line passing through these points. Find equation of this line in a form: y = mx + b I'll send an example later, I have an email problem of some sort.
 Angles/431946: please help me to figure out the supplement of the angle of 111.23 how do i get the supplement?1 solutions Answer 299627 by Alan3354(30993)   on 2011-04-06 09:38:06 (Show Source): You can put this solution on YOUR website!Subtract it from 180.
 Reduction-of-unit-multipliers/431924: please help me to convert 4,756 mL into liters1 solutions Answer 299625 by Alan3354(30993)   on 2011-04-06 09:36:08 (Show Source): You can put this solution on YOUR website!1 liter = 1000 milliliters 4756 ml * 1 liter/1000 ml = 4756/1000 liters = 4.756 liters Notice how the units cancel. That gives you a check to know you converted the right way.
 Angles/431917: Please help me to figure out how to get the complement of an angle of 29.57 degrees1 solutions Answer 299620 by Alan3354(30993)   on 2011-04-06 09:29:31 (Show Source): You can put this solution on YOUR website!It's 90 - 29.57 = 60.43 degrees (if the .57 is decimal, and not minutes)
 Numeric_Fractions/431941: Z=K/M K=?1 solutions Answer 299616 by Alan3354(30993)   on 2011-04-06 09:22:49 (Show Source): You can put this solution on YOUR website!Z=K/M K=? ------- Multiply both sides by M ZM = K K = MZ
 Quadratic_Equations/431925: I have the equation I know the turning point is h,k According to this it is -1,3 when in fact it is 20,3 How is this justified Thanks1 solutions Answer 299615 by Alan3354(30993)   on 2011-04-06 09:21:35 (Show Source): You can put this solution on YOUR website! ------------------------
 Square-cubic-other-roots/431935: please help me with this problem write the expression in simplest radical form. sqrt of 8b^3 so it looks like this, has a sqrt sign and then 8b to the 3rd power. 1 solutions Answer 299613 by Alan3354(30993)   on 2011-04-06 09:14:49 (Show Source):
 Square-cubic-other-roots/431937: I need to combine the radicals and show ALL the steps. please help me 3sqrt15+9sqrt15 I don't know if I'm typing this correctly. There is a number in front of the sqrt sign which means its cube root right?1 solutions Answer 299610 by Alan3354(30993)   on 2011-04-06 09:11:08 (Show Source): You can put this solution on YOUR website!If it's Only 1 step, add them.
 Polynomials-and-rational-expressions/431903: i need help verifying the answer to this one please. unfortunately i am not very good at figuring how to enter them on the computer correctly. thank you. x+7 over 8= x+8 over 9.... a. 1/72 8. 5/24 c. 1 d. 15/17 i answered c but i think a could also be the answer thanks again if you can help have a great day1 solutions Answer 299601 by Alan3354(30993)   on 2011-04-06 07:16:47 (Show Source): You can put this solution on YOUR website!(x+7)/8 = (x+8)/9 9(x+7) = 8(x+8) 9x + 63 = 8x + 64 x = 1
 Volume/431255: The volume is 382 and the height is 30 how do I find the answer in cubic feet1 solutions Answer 299600 by Alan3354(30993)   on 2011-04-06 07:14:54 (Show Source): You can put this solution on YOUR website!What is the question?
 Mixture_Word_Problems/431902: IF ONE LB =\$12.30 HOW MUCH IS ONE KG. I know that there is 2.204 pounds in one kg and conversely there is .45359 kg in one pound. Do I multiply \$12.30 by 2.204 or divide it by .45359?1 solutions Answer 299599 by Alan3354(30993)   on 2011-04-06 07:13:24 (Show Source): You can put this solution on YOUR website!Try both, and see what you get.
 Vectors/431778: 1.what is the product of the complex numbers (3+i) and (3-i)? 2.If i=the square root of _1,show the location of 5_2i on a graph? 3.If i=the square root of _1,what is the value of i the power of 4? 4.If i=the square root of _1 and a and b are non-zero numbers,what is 1/(a+bi) PLEASE HELP ME ,THANK YOU FOR WILLING TO HELP ME 1 solutions Answer 299553 by Alan3354(30993)   on 2011-04-05 22:01:08 (Show Source): You can put this solution on YOUR website!1.what is the product of the complex numbers (3+i) and (3-i)? = --------------- 2.If i=the square root of _1,show the location of 5_2i on a graph? I think you mean -1, not underscore 1. Usually the i-axis is the direction of the y-axis on x-y plots, so it would bt 5 to the right and 2 up, or (5,2) in x-y systems. --------------- 3. what is the value of i the power of 4? ---------------- 4.If a and b are non-zero numbers,what is 1/(a+bi) Multiply NUM and DEN by the conjugate of the DEN a-bi 1/(a+bi) = (a-bi)/(a^2 + b^2)
 Volume/431770: Indicate the metric unit that would be best used to express the mass of the object. A living room sofa A) milligrams B) kilograms C) grams 1 solutions Answer 299552 by Alan3354(30993)   on 2011-04-05 21:56:05 (Show Source): You can put this solution on YOUR website!Probably kilograms, or kgs A sofa might weigh 25 kg which is 25000 grams, or 25,000,000 milligrams.
 Equations/431771: Can you please explain how you would work this problem out I just don't understand the whol please excuse my dear aunt sally, but since multiplication goes before division why is it that on this equation you will have to divide before you do your multiplication. Im so confused....please help me understand this.... 35(41-33)÷8-11+17 1 solutions Answer 299551 by Alan3354(30993)   on 2011-04-05 21:54:25 (Show Source): You can put this solution on YOUR website!35(41-33)÷8-11+17 Is it 35(41-33)÷(8-11+17) ? Or (35(41-33)÷8) - 11+17 ?
 Square-cubic-other-roots/431754: What is the cube root of -27?1 solutions Answer 299550 by Alan3354(30993)   on 2011-04-05 21:47:02 (Show Source): You can put this solution on YOUR website!If you mean the cube root of -27, it's -3. --------- If you mean the cube of the square root of 27, that's the square root of 27^3 = =~ 140.296
 Equations/431725: i^241 solutions Answer 299527 by Alan3354(30993)   on 2011-04-05 20:45:26 (Show Source): You can put this solution on YOUR website!= 1
 Polynomials-and-rational-expressions/431730: the principal square root of 169 is 13. What is the other square root?1 solutions Answer 299526 by Alan3354(30993)   on 2011-04-05 20:45:02 (Show Source): You can put this solution on YOUR website!-13
 Square-cubic-other-roots/431741: how do you solve a square root problem when the radicand is raised to a fractional power? (ex: the square root of X raised to the 2/5ths power)1 solutions Answer 299524 by Alan3354(30993)   on 2011-04-05 20:44:33 (Show Source): You can put this solution on YOUR website!Divide the exponent by 2.
 Quadratic_Equations/431681: x^2-10x+25 name how many roots and what kind1 solutions Answer 299523 by Alan3354(30993)   on 2011-04-05 20:43:39 (Show Source): You can put this solution on YOUR website!x^2-10x+25 name how many roots and what kind It's not an equation, there's no equal sign. No equation --> no roots.
 Numeric_Fractions/431708: what is the answer to the fraction 23/5? help1 solutions Answer 299503 by Alan3354(30993)   on 2011-04-05 20:10:10 (Show Source): You can put this solution on YOUR website!What is the question?