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

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Algebra: Expressions involving variables, substitution

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Question 30846: (-2,3);m=-1
show me the steps to solve this
Click here to see answer by Nate(3495)

Question 30846: (-2,3);m=-1
show me the steps to solve this
Click here to see answer by acerX(62)

Question 30896: Kenny is 14 years older than Chad. Next year Kenny will be 3 times as old as Chad. How old is Kenny?
Could you please give me all the steps to finding this answer.
Click here to see answer by venugopalramana(3286)

Question 30897: Kenny is 14 years older than Chad. Next year Kenny will be 3 times as old as Chad. How old is Kenny?
Could you please give me all the steps to finding this answer.
Click here to see answer by venugopalramana(3286)

Question 30898: A man has a daughter and a son.
The son is three years older than the daughter.
In 17 years the son will be twice as old as the daughter is now.
What is the daughter's present age?
Click here to see answer by Paul(988)

Question 30951This question is from textbook Algebra 1
: Hello, my name is Cody McCullough. I need help witha problem that I am helping my brother with. His teacher and I got differnet answers and I want to know the answer to see if I am wrong or right. The question is: Write this equation in standard form. y=4/5x+9 I got the answer to be 4x-5y=45. My brothers teacher got 4x-5y=-45.
PLEASE tell me the answer. Thank you.

P.S 4/5 is a fractionThis question is from textbook Algebra 1

Click here to see answer by acerX(62)

Question 30999: 1/a+1/b=1/c solve for a
Click here to see answer by longjonsilver(2297)

Question 30995: Hello,
My name is Kristin and I am studying for a math placement exam. I am rusty on some Algebra questions. Can you show me how, step by step?
x^2+2x=3
Click here to see answer by longjonsilver(2297)

Question 31018: The son is three years older than the daughter.
In 17 years the son will be twice as old as the daughter is now.
What is the daughters present age?
Can someone please show me all the steps and what the answer is please?
Click here to see answer by Squaretimes47(1)

Question 31009: The Son is three years older than the daughter.
In 17 years the son will be twice as old as the daughter is now.
What is the daughters present age?
Can you please tell me all the ways this can be written out and solved?
Click here to see answer by checkley71(8405)

Question 31090: Question: if 2x-4y=-2 and 3x-2y=3, then 2y+x=
I need help solvng one equation in terms of the other to answer this question.
thanks

Click here to see answer by Cintchr(475)

Question 31090: Question: if 2x-4y=-2 and 3x-2y=3, then 2y+x=
I need help solvng one equation in terms of the other to answer this question.
thanks

Click here to see answer by ikdeep(182)

Question 31125: Problem:
Jessica earned $44 by selling 20 plants and 12 jars of honey. The price for each jar of honey is twice the price of each plant.
Questions:
#7. If p = the price of a plant, write an expression in terms of p for the price of 20 plants.
#8. If p = the price of a plant, write an expression in terms of p for the price of 12 jars of honey. Your expression will have the variable, p, in it.
#9. If p = the price of a plant, write an equation, in terms of p, to represent the total cost of 20 plants and 12 jars of honey. Your equation should use only one variable, p, and it will have an equal sign.
#10 What is the price of each jar of honey? Solve the equation you wrote in question #9, since you have solved for p, you have enough information to find the value.
-------------------------------------------------------------------------------
Please explane each step and why you do it. I am really not understanding how to do sentence problems.
Click here to see answer by mbarugel(146)

Question 19905: please solve this equation: 9x + y = 15, solve for y, thank you
Click here to see answer by mukhopadhyay(490)

Question 31229This question is from textbook Prentice Hall
: I would like to learn how to solve this problem:
2x+4=3x-4
4This question is from textbook Prentice Hall

Click here to see answer by mathwiz07(3)

Question 31236: vector A=3i+4j is a vector in xy plane,
vector B is a vector perpendicular to vector A,
what will be the vector C equal to,which has projections 1 and 2 along vectors A and B?
Click here to see answer by longjonsilver(2297)

Question 31204: hello again...long time i havent needed help from you but the last time u helped a lot...now i was wondering i have this hard chemistry question due tomorrow and i was wondering if by any chance you could answer it...im having a really hard time on it...if u have an answer will you please send it to me as soon as possible because its due tomorrow in the morning...thanks for your help and for taking the time to read it
this is the problem:
2 H2O--> 2 H2+o2
there are two moles of hydtrogen in the first side of the equation
the question is how many moles of hydrogen gas are in the second side of the equation...i know the answer is two for sure (my teacher told me) but i dont know why or how
sincerely
stephanie a.
Click here to see answer by longjonsilver(2297)

Question 31260This question is from textbook Maran Illustrated Effortless Algebra

: y=3x+4

Thanks for your time,
Sincerly,
Shizuna.This question is from textbook Maran Illustrated Effortless Algebra

Click here to see answer by damon(1)

Question 31297: Can u help me find x and y?
3y=4x-9
2x-3y=4
Click here to see answer by mukhopadhyay(490)

Question 31231: You need all of the quarters you can find to use run the washer and dryer. You find $7.25 in quarters and dimes. If you have eight more quarters then dimes, find the number of each coin you collected.
Click here to see answer by checkley71(8405)

Question 31411: I am still stuck with these fractions and cant get it.
(x -2 / 2 ) - (x + 2 / 4)= 1/2
Click here to see answer by benni1013(141)

Question 31412: I don't remember how to solve these types of equations...
3x + 2y = 94.44
Basically the word problem states that a woman went to the store and bought 2 types of shirts. Each shirt has a different price. The problem tells you how much she spent and how many of each shirt she bought... but not the dollar amount of either. If I solve for x or y and then use substitution... I end up zeroing out the problem. What am I doing wrong?
Click here to see answer by stanbon(26259)

Question 31415: First question is:
4x/3+24x/21x=21
in other words 4x over 3 plus 24x over 21x equals 21 its a algebraic solution
the second is a word problem
During an itramural basketball game, Team a sored 19 fewer points than team b. Together, both teams scored a total of 143 points. How many points did team a score during the game?
Click here to see answer by stanbon(26259)

Question 31423: Determine the maximum and minimum values for the following set.–8, –23, 31, 18, –20, –15
Click here to see answer by stanbon(26259)

Question 31424: Evaluate. 42 + 2·7 – (5 · 4 – 15)

Click here to see answer by marshalltamika(3)

Question 31461: How do I solve the equation: 2u^4-5u^3-12u^2+2u-8 divided by u-4 ?
Click here to see answer by Cintchr(475)

Question 31545: I need help with writing step by step solution for 1/2b-1/2=1/4b and i believe the answer is b=2 but I need to write the solution
Click here to see answer by checkley71(8405)

Question 31591: Is there an easy way to solve systems with 3 variables? I'm having a hard time understanding exactly what to do & the step-by step solutions.... PLEASE HELP !!
Example:
solve the system:
3x-3y+z=1
x+6y-z=5
2x-9y+2z=-8
AND
x+y=0
x+z=1
2x+y+z=2

Thank you very much for your help

Dianne
Click here to see answer by longjonsilver(2297)

Question 29285: A fishing boat traveled 3 hours against a 6km/hr current. The return trip took 2 hours. Find the speed of the boat in still water.
Click here to see answer by checkley71(8405)

Question 31675: 2x-5y=3
4y-x=-3
this is very important please answer as soon as possible
thanks alot
ben
Click here to see answer by checkley71(8405)

Question 31718This question is from textbook glencoe algebra 1
: 3x-y=4
2x-3y=-9This question is from textbook glencoe algebra 1

Click here to see answer by johnthegame(1)

Question 31802: hi i was wondering how u do elimination using mulitplication, its in ch. 13 in the algebra 1 book on systems of equations and inequalities, please help thank you. question number one is shown below.
2x+6y=10
5x+3y=1
Click here to see answer by mbarugel(146)

Question 31860: What is an algebraic equation for;
The sum of twice a number plus 12 is 74. What is the number?
Click here to see answer by stanbon(26259)

Question 31834This question is from textbook Prentice Hall Mathematics Algebra 1
: 4x-y=-12
-6+5y=-3This question is from textbook Prentice Hall Mathematics Algebra 1

Click here to see answer by ikdeep(182)

Question 32043: 3(-x - 4) = 3x + 5(x + 2)
Click here to see answer by mukhopadhyay(490)

Question 31927: I need to find the value of each variable.
a+b=236
a+x=244
a+y=228
a+z=250
b+x=258
b+y=230
b+z=246
x+y=238
x+z=242
y+z=252
Click here to see answer by stanbon(26259)

Question 31808: {y=2x+6
{y=2x-5
These two equations represent lines that have
the same slope (2) and different y-intercepts.
They are therefore parallel lines and there is
no solution common to the two equations.
Cheers,
Stan H.
Click here to see answer by stanbon(26259)

Question 32220: What if an equation had three vaiables?
Click here to see answer by checkley71(8405)

Question 32287: Which of the following expressions represents the product of 3 less that twice x and 2 more then the quantity 3times x ?

Click here to see answer by mbarugel(146)

Question 32281This question is from textbook Intermidiate Algebra

: I was wondering if you could help me with this problem. This one is on dividing rational expressions.
3x^2(x-4y)-20x(x-4)+25(x-4y)Over 3x^2(4y-x)-14x(4y-x)-5(4y-x) / 4x-1 Over 3x+1This question is from textbook Intermidiate Algebra

Click here to see answer by Fermat(127)

Question 32408: If a map has a scale of 11/2 inches to the mile and if a distance between two points on the map is 9 inches apart, how much is that distance in actual miles?

The book says 6 miles. why? 11/2 * 9??
Click here to see answer by Cintchr(475)

Question 32815: Simplify the rational expression:
x^2-3x-10/x^2-x-20

Click here to see answer by stanbon(26259)

Question 32780: The question is: Use Elimination to solve:
7x-4y=29
3x+5y=-1
Click here to see answer by stanbon(26259)

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