Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 26110: x+2y=6
y=2x+3
use the substitution method
Click here to see answer by stanbon(57307)

Question 26244: I have been out of school for several years. I cannot remember the equation to convert cubic inches to gallons. Can you please help me.
Thank You.
Click here to see answer by AnlytcPhil(1276)

Question 26247: I'm trying to factor this completely and I'm very stuck!
8x³ + 343
Click here to see answer by AnlytcPhil(1276)

Question 26250: Could I have the answer for this question please.
7-3(5t-10)=67
is the answer t=6 or t=2
when calculating do I use -3x15 or 3x15. Could you give me some algebra tips for this. Thanks

Click here to see answer by AnlytcPhil(1276)

Question 26331: Ax+B=C
Please solve and explain how u got the answer
Please and thank you
Brianna
Click here to see answer by longjonsilver(2297)

Question 26271: I do not get how i am supposed to show every step of the alebra eqaution or "showing my work"? can you please help me?
Click here to see answer by longjonsilver(2297)

Question 26349: Can you please help me with this problem. We've figured out one answer but there is another answer. So how do you get two answers. Please help us. Rhonda and Tiffany
x^2 + 9x + 18 = 0

Click here to see answer by venugopalramana(3286)

Question 26374: 3(g-3)=6
Click here to see answer by uknouluvme89(30)

Question 26252: How would this be factored completely?
128-2a^3
Thank you!
Click here to see answer by uknouluvme89(30)

Question 26169: 5(2m+7)+2=7
Click here to see answer by uknouluvme89(30)

Question 26107: x+y=3
y+x=5
use the substitution method
Click here to see answer by uknouluvme89(30)

Question 26400: Mandy is now twice Katy's age. In six years she will be 1.5 times Katy's age.
How old is Katy
Click here to see answer by Paul(988)

Question 26386: This equation I have been stuck on it for three days now and can not seem to get past it:
5-a/b
------
15/b
My answers for solutions are
A) 5b - 1
-----------
15
B) 5b - a
----------
15
C) 5-a
--------
15
D) b-a
--------
3
This is a division problem that is why I put the lines there. I believe I would divide the 15 by 5 = 3. Then I think I would also divide the b by the b which would eliminate the b.
So I would have gotten this for an answer:
5 - a
--------
3
But this is not an answer on the test as you can see. Where am I going wrong with this problem? Thank you so much for your help!
Click here to see answer by Earlsdon(6287)

Question 26450: How to i write an equation for each relation. I need help on HOW to find the solution.
x 1 2 3 4 5
f(x) 5 7 9 11 13
can you help me learn the steps.
Click here to see answer by longjonsilver(2297)

Question 26422: i need help in solving with a coin and intrest problem> it goes like this an invester has 500$ more invested at 7% than he does at 5%. if his annual interest is $515, how much does he have invested at each rate?
Click here to see answer by wuwei96815(245)

Question 26420: Rahdi played on online trivia quiz game. In the game , each right answer is worth 3 points, and each incorrect answer was worth -5 points. Randi answered 25 quiz questions and had a total of 27 points. How many more correct answers than incorrect answers did Randi have? I know the answer is 19 correct and 6 incorrect, but I am having trouble finding the correct equation.
Click here to see answer by stanbon(57307)

Question 26466: Find an equation in slope-intercept form(where possible)
Through (1/2, 5/3) and (3, 1/6)
Click here to see answer by AnlytcPhil(1276)

Question 26462: find the slope of each line that has a slope
y = 2x
Click here to see answer by wuwei96815(245)

Question 26464: find an equation in slope-intercept form (where possible)
through (1,3),m = -2
Click here to see answer by elima(1433)

Question 26468: find an equation in slope-intercept form (where possible)
Through (-1,4), parallel to x + 3y = 5
Click here to see answer by algebrawiz(2)

Question 26463: q=p/d q=p over d, solve for the variable p
Click here to see answer by stanbon(57307)

Question 26508: How do you simplify the following:
1. 3rd order radical of 432x^8 (instead of square root it is the cube root)
2. Solve: Square Root (2x+6)= 2 Square Root x
Thank you
Click here to see answer by stanbon(57307)

Question 26604: 5 (x+1)= x+25
Click here to see answer by Alwayscheerful(414)

Question 26574: 3x-(-x)+4=2(-x)+10 x= -x=

please help me solve this equation
Click here to see answer by Alwayscheerful(414)

Question 26638: 4-(2-3z)=6z-(4z+3)
Please help! Thanks.
Click here to see answer by longjonsilver(2297)

Question 26688: Please Help Me: Evaluate b (a+c) if a=7.8 , b=5.05 , c= 0.02 .
Click here to see answer by Sirena(1)

Question 26712: Rewrite the equation 2x - 8y = 48 2x - 8y = 48 as a function of x.
Please help.
Thank you.
Click here to see answer by longjonsilver(2297)

Question 26744: I REALLY NEED HELP WITH THESE PROBLEMS, ITS DUE TOMORROW AND I CANT SEEM TO GET THE ANSWERS TO THESE PROBELMS..IT IS ABOUT VERBAL PROBLEMS..THANKS!
THREE LESS THAN FIVE TIMES A CERTAIN NUMBER IS EQUAL TO 67 MORE THAN ONE-THIRD OF THE NUMBER. FIND THE NUMBER.
THANKS AGAIN!
Click here to see answer by longjonsilver(2297)

Question 26745: Solve for x: 2(x-3) = x+3
Click here to see answer by longjonsilver(2297)

Question 26666: Solve the equation 25^(x+1)=125^x
Help!
Click here to see answer by venugopalramana(3286)

Question 26667: Solve the equation Inx=2. Round the answer to four decimal places.
Please help!
Click here to see answer by venugopalramana(3286)

Question 26773: in this question you must choose x only from the numbers 0,1,2,3,4,5,6,7,8,9,10
can you show me how to complete these questions 1. x>7
Click here to see answer by AdolphousC(70)

Question 26785: Please help me solve this problem:
5+6x=23
I tried to solve it:
5+6x=23
5+6x/6-5=23-5

Thanks for your help
Click here to see answer by elima(1433)

Question 26795: Translate the following statement into an algebraic equation. Let x represent the number. 8 less than 2 times a number is 9 times that same number.
Please help.
Thank you so much.

Click here to see answer by whty89(20)

Question 26949: I have a finance stock account margin problem where algebra is needed. The equation that needs to be solved comes out as follows:

I have to solve for p, which is the price at which the maintenance margin call will have to be made by the broker. I have tried everything I can think of and can't solve this. Help would be much appreciated, thank you.
Click here to see answer by mbarugel(146)

Question 27025: write an equation for the line that is perpendicular to x/5 - 3y = 6 and passes through the point (-2,4).
Click here to see answer by josmiceli(9671)

Question 27029: Which label describes the following?
3x + 6 = 10
A) Expression
B) Linear equation
C) Equation which is not linear
Please help me.
Thank you very much.
Click here to see answer by venugopalramana(3286)

Question 27053: 8.
Combine like terms.

Click here to see answer by mbarugel(146)

Question 27104: can you show me how to do these problems:
2n-3n and 2a-3a=7?
thanks
angie

Click here to see answer by elima(1433)

Question 27153: 5/3(3x-15)+6=1
Click here to see answer by Alwayscheerful(414)

Question 27220: I took my test and got a lot of answers wrong. He circled the correct answers but no matter what I try I keep getting mine. For example:
3(x-2)+7=2(x+5)
I distribute first, to get 3x-2+7=2x+10
I simplify to get 3x+5=2x+10 and then again to get x+5=10, then x=5, which is my answer. He circled 9 as the right answer. In fact, 5 isn't even an option (multiple choice). What am I doing wrong?? I keep getting 5 no matter how I do it.
Another is 11x-(6x-5)=40
I combine to get 5x-5=40, then simplify to get 5x=45, and again to get my answer : x=9
He has 7 circled as the right answer.
What am I doing wrong?
Thank you,
Sarah
Click here to see answer by rodriguezh2(15)

Question 27313: When Tristan visits Isolde on Valentine's Day, he's planning to bring her a one pound box of chocolates. He knows that when they share a one pound box of chocolates, it usually lasts for two weeks. When he eats a one pound box of chocolates on his own it lasts for six weeks.
How long should a one pound box of chocolates last if Isolde eats it alone?
Remember to explain how you solved the problem and show how you know you are correct.
Note: Assume they don't eat faster or slower when they are alone.
Click here to see answer by bmauger(101)

Question 27416: I was asked to solve the following equation using the quadratic formula.
3x+4=2x^2-7
PLEASE HELP!!
Click here to see answer by stanbon(57307)

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