# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 23711: Hello, I've got a series of equations and only one of them can be usefull to find the solutions of the others. The equation is 3 x + 2 y = 189 My problem is that I can't possibly find x nor y and thus I'm stuck with the other equations. Can you tell me what I should look for in order to find the solutions? Thank you Click here to see answer by rapaljer(4667)

 Question 21689: i dont understand how to divide powers like 10 to the 9th power divided by 10 to the 7th power or like 2 to the 8th power divided by 2 to the 3rd power and monomial powers divided Click here to see answer by stanbon(57219)
 Question 21689: i dont understand how to divide powers like 10 to the 9th power divided by 10 to the 7th power or like 2 to the 8th power divided by 2 to the 3rd power and monomial powers divided Click here to see answer by lexis_utler(1)

 Question 23743: My algebra teacher is rapidly trying to teach us Direct Variation(ax+b=0), she says it's similar to (y=mx+b) but she's not telling me and my classmates how? So could you help me understand how to work direct variation... here's one of the problems we had in class... 2x-5=1 she tells us to graphicaally, then check it algebraically, but I don't even understand how to start. Would you please help me?! Click here to see answer by venugopalramana(3286)

 Question 23773: How do I solve for b? 16b-squared - 9 = 0 Click here to see answer by AnlytcPhil(1276)

 Question 23793: how can i subtract or add this, to get the right answer? (b/b-1)+(2b/b^2-1) so far i have: b(b+1)/(b-1)(b+1) + 2b/(b-1)(b+1) do you know the answer? Id really appritiate it if you could help Thank you Click here to see answer by stanbon(57219)

 Question 23790: what is the answer to this fraction? can you simplify it? a^2-2ab+b^2/a+b is it (a-b)^2? Thank you for helping me, ivi Click here to see answer by stanbon(57219)

 Question 23800: A quarterly gas bill is given by the formulae c = S + nx where C is the total cost of the bill in pence S is the standing charge in pence n is the number of units used x pence is the cost per unit. (a)calculate the value of C when S = 860, n = 152 and x =7 (b)Rewrite the formula so that it is written in the form n =... Click here to see answer by stanbon(57219)

 Question 23789: How to simplify this equation? 3a+b/6a+2b i have asked others to give me the answer but this is what they got: 3a+b3a/2+b^2/2 im hoping that you can help me on this. Thank you so much Click here to see answer by stanbon(57219)

 Question 23788: Hi i'm stuck with this one can anyone point me in the right direction Solve log(2x+3)=log(4x)+2 for x giving answer correct to 3 sig figures Click here to see answer by stanbon(57219)
 Question 23788: Hi i'm stuck with this one can anyone point me in the right direction Solve log(2x+3)=log(4x)+2 for x giving answer correct to 3 sig figures Click here to see answer by NaiXLG(18)

 Question 23783: A paper mill produces 350 tones of paper from sawdust each week. if 50 tons more are used for newspaper than for wrapping paper, how many tons are used for each? Click here to see answer by music974(43)

 Question 23792: how do you multily and show this question in simplist form? (x^2-9/x+2)(x^2-4/x-3) my answer was x^4-13x-x^2-8/x-6 is this right? if not, what is the answer? Thank you. Click here to see answer by Earlsdon(6287)

 Question 23799: if a =1, b =2, c= -3 find the value of c-ab c+ab Click here to see answer by elima(1433)

 Question 24008: This Christmas, Jack will be 2 years from being twice as old as Jen. The sum of Jack's age and three times Jen's age is 33. How old is jen? One of your friend is heading north for the Christmas holiday and the other friend is heading south. If their destinies are 1029 miles apart and one car is traveling at 45 miles per hour and the other car is traveling at 53 miles per hour. How many hours before the two cars pass each other? Click here to see answer by Paul(988)

 Question 24025: i have to write an equation of the line with the given slope and y intercept...example: slope 5 y intercept -15, what am i supposed to do? do they want me to put it in the y=mx + b form or something else? Click here to see answer by rapaljer(4667)

 Question 23951: Help please somebody I'm having a problem with the following question The distance of a body from a point is given by s=xsin(wt+alpha). Show that the velocity and acceleration are given by v=x cos(wt+alpha)and a=-w^2s Point me in the right direction please Cheers Paul Click here to see answer by khwang(438)

 Question 23911: how do you solve systems with subtitute's can please solve a few of these example problems so I get an ideal of what I need to do. 1)2x+7y=3 x=1-4y 2)4c=3d+3 c=d-1 3)3x-5y=11 x-3y=1 4)3x-2y=12 x=2y=6 Click here to see answer by elima(1433)

 Question 23967: How do i get the answer to this problem,it calls for simplification, can you help me? my answer was 2(x^2-x+2) i know its wrong Thank you in advance. elias Click here to see answer by elima(1433)

 Question 24064: PLEASE HELP ME SOLVE THIS EQUATION WORD PROBLEM: At the beginning of the school year , Jamie's height was 62 and 1/2 inches . During the year she grew 1 and 3/4 inches , 1 /8 of an inch more than she grew the previous year. (A) What was jamie's height at the end of the school year? (B) How tall was Jamie at the start of the previous school year? Thank you Click here to see answer by elima(1433)