# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 603622: how do Iwork this problem? (0.95 - 0.68) x 6 Click here to see answer by Alan3354(30983)

 Question 603839: Can you help my son work out 3i+1=-9 Click here to see answer by Alan3354(30983)

 Question 603866: 1/x+1/y=1/z solve for x. I have seen the answer, x=yz/y-z. I need to know how the answer is derived. Click here to see answer by scott8148(6628)

 Question 604047: Write an equation which models how old in years each of you will be when you are 3 times as old as the younger person. I am 27 Youngest is 11 I don't understand how to go about doing this equation wise. Click here to see answer by georgiahammond(1)

 Question 604124: f(x)=-6x^2+6x+12. How do i solve for x? thanks! Click here to see answer by jim_thompson5910(28504)

 Question 604125: Mitchell paid \$94 for ten tickets to the concert. Adult tickets cost \$15 each. Students tickets cost \$8 each. How many of each kind of tickets did he buy? Click here to see answer by mananth(12270)

 Question 604144: given the equations: y= x^2-6x+10 y+x=4 what is the solution to the given system of equations Click here to see answer by alicealc(281)

 Question 604120: I need help with three math problems: #1.) 4x^2 + 10x +6 #2.) x^2 - 5x+6 = 0 #3.) (6x + 2) (3x - 12) = 0 Thanks! Click here to see answer by mananth(12270)

 Question 604240: Solve the following system equations using the addition method: 3x-4y=8 and 2x+3y=9 y=? x=? Click here to see answer by flame8855(424)

 Question 604220: x is now twice as old as y. Four years ago x was three times as old as y was then. How old is x now? Click here to see answer by flame8855(424)

 Question 604293: [(x^2+x+2)/(x^2+4x+3)]/[(x+2)/(x+3)]. The "Compass" book by Callahan says the answer to this when simplified is 1. I don't see how that is possible. Can you show me the steps? Click here to see answer by flame8855(424)

 Question 604337: I need to write an equation from this series of data and I am confused. Below is my data: Years Male Female 0 40.656 24.137 5 42.493 24.994 10 43.360 26.085 15 43.236 27.920 20 41.391 29.643 25 41.375 29.554 30 43.615 32.153 35 42.743 32.903 36 42.261 32.515 PLease help in a detailed way on how to come about writing an equation for this data to solve to see when the median female earnings will meet the median male earnings. Click here to see answer by KMST(1868)

 Question 604542: lisa can sweep the paths around her home in 30 minutes. Her sister Tania takes 20 minutes to do the same job. If they work together, how long will it take to complete the job? Click here to see answer by nerdybill(6951)

 Question 604611: how you get the sum of all the whole natural numbers greater than 89 and less than 101 Click here to see answer by Edwin McCravy(8882)

 Question 604541: there are 12 boys and 12 girls in a science class. if 6 boys can read 6 science journals in 6 weeks and 4 girls can read 4 science journals in 4 weeks, how many science journals can the entire class read in 12 weeks? Click here to see answer by ankor@dixie-net.com(15638)

 Question 604787: Solve equations by factoring Principle of zero products Application problems Number Sense: The sum of two number is six. The sum of the squares of the two numbers is twenty. Find the two numbers. a + b = 6 a^2 + b^2 = 20 Don't know if I set it up right and what to do next. Click here to see answer by lwsshak3(6472)

 Question 604764: Can someone tell me what to do with this problem? Thanks for your help! Add. Simplify; if possible. 4c/5c-10 + 5c/10c-20 Click here to see answer by alicealc(281)

 Question 604785: Solve equations by factoring Principle of zero products Application problems Number Sense: The square of a positive number is six more than five times the positive number. Find the number x^2 + 5x + 6 is how I set it up (x+2)(x+3)= 0 x+2=0 x = -2 x+3=0 x = -3 The book gives an answer of 6 Click here to see answer by lwsshak3(6472)

 Question 604820: ((2 * 2) + 2 - 2) / 2 Click here to see answer by alicealc(281)

 Question 604838: factor by grouping 4z^2+8z-az-2a factor the trinomial 2s^2-9s+9 factor r^2-64 Click here to see answer by alicealc(281)

 Question 602893: 10(2x – 3) – 2(3x + 4) = 4(x – 1) + 16 Click here to see answer by jim_thompson5910(28504)

 Question 602891: 5(2x + 4) – 3(2x – 4) = 2x + 10 Click here to see answer by jim_thompson5910(28504)

 Question 604948: Find the equation of the line passing through (3,5) perpendicular to the line 5x-3y=18 Click here to see answer by scott8148(6628)

 Question 605119: What is the expression of "3n over n-5 + 3 over 5-n" I am not sure on what process to use Click here to see answer by stanbon(57246)

 Question 605178: how many bills are there in \$ 6590? pls let me know what is logic used Eg \$10=4bills \$50= 1 bill Click here to see answer by Alan3354(30983)