# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 384265: In general, why might it be important to solve an equation for different variables? For example, the equation for degrees fahrenheit is given by F = 9/5 C + 32, where C is Degrees celsius. In this example why or when would we want to solve for C? Click here to see answer by rfer(12670)

 Question 384305: Find the equation of a line thru (-3,-12) and parallel to the line thru(6,0) and(4,-5). Click here to see answer by rfer(12670)

 Question 384346: at a height of h meters, you can see V kilometers to the horizon. These numbers are related by the equation V = 3.5 sqrt h. A person can see 385 km to the horizon from an airplane window. How high is the airplane? Click here to see answer by stanbon(57387)

 Question 384536: Can you show me how to write this sentence? Four more than twice a number k is no more than the sum of k and 11. Click here to see answer by rfer(12670)

 Question 384661: ***I NEED THE STEPS TO SOLVE THIS PROBLEM SO THAT I CAN BETTER UNDERSTAND IT...PLEASE HELP*** ANSWER: (a)2sqroot2 ft (b) 2ft PROBLEM: DIMENSIONS OF AN AQUARIUM An open-topped aquarium is to be constructed with 6ft-long sides and square ends. (a) Find the height of the aquarium if the volume is to be 48ft^3. (b) Find the height if 44ft^2 of glass is to be used. THANK YOU!!!!!!!! Click here to see answer by Theo(3464)

 Question 384752: Find the center and radius of the circle. x2 + (y + 7)2 = 4 Click here to see answer by ewatrrr(10682)

 Question 384854: I don't understand the following math problem and would appreciate any help. 7/8 = n+2/3 Can someone please explain? Thank you!! Click here to see answer by rfer(12670)

 Question 385018: how do I write as an equation; the sum of three times a number and five is negative two Click here to see answer by richard1234(5390)

 Question 385023: how do i write and solve this; at a tournament, the runner up scored one point more than half the champions score. if the total number of points made by both players was 13, how many points did the champion score? Click here to see answer by rfer(12670)

 Question 385092: two thirds a+2= 1/3(4a+1) or 2/3a+2=1/3(4a+1) (after distributing) Click here to see answer by tara0066(31)

 Question 385172: Fill the parentheses so that each equation is correct. 13+ ( )= -4 Click here to see answer by stanbon(57387)

 Question 385259: Determine whether the given number is a solution to the equation following it. 5,3x-7=2x+1 Click here to see answer by jim_thompson5910(28598)

 Question 385310: write an algebraic equation which could be used to solve the following problem. then find the solution: "A 40-inch rope is cut into three pieces so that the second piece is four times as long as the first and the third piece is three times as long as the first piece. Find the length of all three pieces." im so confused Click here to see answer by texttutoring(324)
 Question 385310: write an algebraic equation which could be used to solve the following problem. then find the solution: "A 40-inch rope is cut into three pieces so that the second piece is four times as long as the first and the third piece is three times as long as the first piece. Find the length of all three pieces." im so confused Click here to see answer by mananth(12270)
 Question 385310: write an algebraic equation which could be used to solve the following problem. then find the solution: "A 40-inch rope is cut into three pieces so that the second piece is four times as long as the first and the third piece is three times as long as the first piece. Find the length of all three pieces." im so confused Click here to see answer by vampirewitchreine(6)

 Question 385329: Find the 3 complex solutions to the equation z^3 + 2i = 0 Click here to see answer by stanbon(57387)

 Question 385422: Please help me with this question, the book in front of me explains nothing on how to make it work, and i continue to come out with the wrong answer! i need to know what X equals and i keep coming out with something like six, which is not right because the answer key says 23? Thank you! Click here to see answer by stanbon(57387)

 Question 385452: HELP PLEASE! I Don't know How to Do this ... Solve for x. 1) x/4+10>2 2) -6x>18 x>-3 3)|x+4| >6 Click here to see answer by stanbon(57387)
 Question 385452: HELP PLEASE! I Don't know How to Do this ... Solve for x. 1) x/4+10>2 2) -6x>18 x>-3 3)|x+4| >6 Click here to see answer by edjones(7569)

 Question 385520: Write an equation that is a direct variation with a constant of variation of 2/3. Click here to see answer by stanbon(57387)

 Question 385579: Which equation could you use to solve 0=4x^-3x-2? Click here to see answer by Alan3354(30993)

 Question 385741: Equation of a circle if I have P (-5,2) and Q (3,-8) I have it figured as -1, -3 then r= square root of (-1-3)^2 + (-3+8)^2 = sqaure root 41 so the equation of the circle would be (x+1)^2 + (y+3)^2 = 41. But thing seems a miss.... could you look this over for me? Thanks Melody Click here to see answer by robertb(4012)

 Question 385890: Find the center and the radius of the following: x^2 - 6x + y^2 + 10y + 25 = 3 Click here to see answer by mananth(12270)

 Question 385935: how do I make this exercise -5n-8(1+7n)=-8 -8(-8x-6)=-6x-22 Click here to see answer by mananth(12270)