Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 236472: Simplify: (t^2 + t - 6) / (t^2 - 7t + 10)
A question at De La Salle High School, New Orleans Mu Alpha Theta tournament.
Click here to see answer by jim_thompson5910(28598)

Question 236439: (6t-9)+(4t)=180
Click here to see answer by jim_thompson5910(28598)

Question 236670: solve for x: 3x = 9x
Click here to see answer by stanbon(57387)

Question 236670: solve for x: 3x = 9x
Click here to see answer by checkley77(12569)

Question 236650: Simplify each expression using the square root method.
sq root of -300

Click here to see answer by checkley77(12569)

Question 236688: What is 2/3 of a number reduced by 11 is equal to 4 more than the number.
Click here to see answer by stanbon(57387)

Question 236714: 9x-8y=9 Solve for Y Function
Click here to see answer by stanbon(57387)

Question 236869: I don't know if this is the right topic but I am having trouble with something. What does "mod" mean? I have read and read websites and still it makes absolutely no sense.
How do I solve something with mod in it?
Click here to see answer by jim_thompson5910(28598)

Question 236987: what is the answer to 3-4q=10q+10?
Click here to see answer by RAY100(1637)

Question 236987: what is the answer to 3-4q=10q+10?
Click here to see answer by thrasherlax74(11)

Question 236993: 3(31-12t)=82
round result to nearest hundredth

I think the answer is t=0.30
Click here to see answer by rfer(12670)

Question 237038: i have the equasion a+b+c=ab i must find the value of c
Click here to see answer by rfer(12670)

Question 237058: what is 2-3/4z=1/8z+9
could you please explain to me how to work this problem.
thankyou :)
Click here to see answer by solver91311(16897)

Question 237075: My son is in honors geometry, and has always struggled with a particular type of algebra problem which has surfaced again now in geometry. In this case, he is determining the values of x and y in order to tell the degree of angles in parallellograms.
How do we find the values of x and y in the following?
x - y = 45
x + y = 85
Click here to see answer by unlockmath(1603)

Question 237079: The sum of twice a number plus six times another number? Not sure how to write this. Would anyone mind helping please?
Click here to see answer by solver91311(16897)

Question 237219: ahhmmm... im not really good at this... I'm just confused in law of exponents..
for example: 12a to the 3rd power.. over 4b to the 2nd power.... or,, (16a)to the 2nd power or (16a)cube... its very difficult,, pls. give me some tips or tell me whats the rules in solving those problems.. I hope you really answer my question... Im only 13 yrs old,, and im not a fast learner..
thank you Patty.
Click here to see answer by Theo(3464)

Question 237216: ahhmmm... im not really good at this... I'm just confused in law of exponents..
for example: 12a to the 3rd power.. over 4b to the 2nd power.... or,, (16a)to the 2nd power or (16a)cube... its very difficult,, pls. give me some tips or tell me whats the rules in solving those problems.. I hope you really answer my question... Im only 13 yrs old,, and im not a fast learner..
thank you Patty.
Click here to see answer by ankor@dixie-net.com(15660)

Question 237217: ahhmmm... im not really good at this... I'm just confused in law of exponents..
for example: 12a to the 3rd power.. over 4b to the 2nd power.... or,, (16a)to the 2nd power or (16a)cube... its very difficult,, pls. give me some tips or tell me whats the rules in solving those problems.. I hope you really answer my question... Im only 13 yrs old,, and im not a fast learner..
thank you Patty.
Click here to see answer by rapaljer(4667)

Question 237222: your company produces two models of bikes Model A and Model B Model A takes 2 hours to assemble and Model B takes 3 hours to assemble. Model A cost $25 to make each bike where Model B costs $30 to make per bike. If your company has 34 hours and $350 per day for these two bikes, how many of each can be made in a day? Solve equation using substitution or elimination. Explain how to check your solution for both equations.

Click here to see answer by ankor@dixie-net.com(15660)

Question 237440: I need help plz.. Solve by the substitution method. What is the solution?
3x - 2y =-6
5x + 24 =y
Click here to see answer by stanbon(57387)

Question 237471: x does a job in 6 days. Y does the same job in 3 days. If they do the job together, how long will it take them to finish the job?
Click here to see answer by checkley77(12569)

Question 237442: Plz help.. need to solve by the substitution method.. what is the solution
8m + n=1
m - 8n=57
Click here to see answer by College Student(505)

Question 237646: Hi I really need help on this problem:
Solve for F.
C = 5/9(F-32)
Thanks
-Drea
Click here to see answer by College Student(505)

Question 237706: The sum of 2 numbers is 2 and their product is 8/9. Find their numbers.
This is all I have..a+b=2 and (a)(b)=8/9
Now what?
Click here to see answer by jim_thompson5910(28598)

Question 237172: I NEED TO LEARN HOW TO SIMPLIFY EXPRESSIONS WITH EXPONENTS
Click here to see answer by College Student(505)

Question 238013: Please show me how to solve for z; here is how the problem is written: 36x-12y-3z=81
Click here to see answer by edjones(7569)

Question 238011: Can you please help me solve for x; here is the way it is written: xy-8=t
Click here to see answer by edjones(7569)

Question 238037: Let x be a positive number and y be its reciprocal. Compute
1/(x+1) + 1/(y+1)
Click here to see answer by jsmallt9(3296)

Question 238057: (d + 1)(d - 1 + 6) d = 2
Click here to see answer by nyc_function(2733)

Question 238067: Hello, here is my question.
A water balloon is dropped from the top of a building that is 300 feet tall. Neglecting wind resistance, the distance traveled by the balloon is given by the function , where d(t) is the distance traveled in feet after t seconds. How many seconds will it take for the water balloon hit the ground?
Thanks.
Click here to see answer by Alan3354(30993)

Question 238182: How do I solve -3 + m/3 = 12
Click here to see answer by College Student(505)

Question 238215: three is added to a number, and then the sum is multiplied by 4. The result is 16. Find the number
Click here to see answer by nyc_function(2733)

Question 238234: two x+ one third y = 7
Click here to see answer by checkley77(12569)

Question 238240: 6n-42=4n
whats my solution?i need all the steps

Click here to see answer by JimboP1977(308)

Question 238239: 2x+1y =7
-
3
Click here to see answer by solver91311(16897)

Question 238345: please help me solve a/b=c solve for b and h-4/j=k solve for j
Click here to see answer by stanbon(57387)

Question 238625: 2p+p=(1/4*2p)=150
Click here to see answer by stanbon(57387)

Question 238651: 2p+p=1/4*2p+150
Click here to see answer by rfer(12670)

Question 238884: x - 9y = 101
x - 7y = 75
Click here to see answer by unlockmath(1603)

Question 238886: find an equation of the line containing the given pair of points

(-5,-1) and ( -2,-8)
Click here to see answer by unlockmath(1603)

Question 238970: Need help figuring this out:
Scenario: You have a part-time job delivering packages. Your current employer pays you a flat rate to deliver packages. You discover that a competitor pays its employees hourly in addition to paying them a flat rate per package.
Question:
Develop an algebraic equation with clearly defined variables to represent the cost/yield of each option.
my first attempt:
X= packages delivered Y = hours worked
a. .75x = .05x+8(15)
b. .75(200) = .05(200) + 8y

I was told that this was too complex nd needed to be simplified.
Click here to see answer by stanbon(57387)

Question 239103: train a and b are on parallel tracks. Train a is going 100 miles per hour and reaches station A at 4:15am. Train b is going 110 miles per hour and reaches station A at 4:45am. At what point will train b catch train a?
Click here to see answer by checkley77(12569)

Question 239157: how to solve using linear combination's 2x-y=8 and x+y=1

Click here to see answer by stanbon(57387)

Question 239386: find the equivalent expression without parenthesis -(d+91)=
Click here to see answer by nyc_function(2733)

Question 239776: For this problem write the equation that expresses the relationship among the variables, and then use the given data to solve for the variation constant

y is directly proportional to x, and y=38 when x=114
Click here to see answer by Theo(3464)

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