Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 309282: 3x/6 -4/12 =7 ; -36x +24=-504
In the following pair of equations, both sides of the equation on the left were multifplied by a number to get the equation on the right. What is the number?
I know the answer is -72.
If you could please help me find out how to get that answer that would be so wonderful.
Thank you!!
Click here to see answer by jim_thompson5910(35256)  |
Question 309288: I have the correct answer, I just don't know how to get it??
Please help.
Correct answer. 13m + 3=6-8m
Translate the following verbal phrase into a mathematical expression using m for the variable.
3 more than the product of a number and 13 gives 6 decreased by number multiplied by 8.
Click here to see answer by mananth(16946)  |
Question 309345: 1.what is the solution of the system of equations?
4x-8y=-4
5x+7y=-22
2.solve the system of euations below by elimination?
2x+y=15
5x-y=13
3.what is the solution of the systen of equations below?
4y-7x=-1
2y+3x=-33
4. give the solution to this system of equations,
2/7x+3/5y=-2
4/7x+1/5y=6
5.use the elimination process to solve the system of equations below,
-3x+5y=12
6x-10y=-21
6.solve the system of equations
5x-2y=11
2x-12=-3y
7.the sum of four times number and six times a second number is 36. the doffrence of five times the second number and thre times the first number is 49. find the numbers
Click here to see answer by nyc_function(2741)  |
Question 309345: 1.what is the solution of the system of equations?
4x-8y=-4
5x+7y=-22
2.solve the system of euations below by elimination?
2x+y=15
5x-y=13
3.what is the solution of the systen of equations below?
4y-7x=-1
2y+3x=-33
4. give the solution to this system of equations,
2/7x+3/5y=-2
4/7x+1/5y=6
5.use the elimination process to solve the system of equations below,
-3x+5y=12
6x-10y=-21
6.solve the system of equations
5x-2y=11
2x-12=-3y
7.the sum of four times number and six times a second number is 36. the doffrence of five times the second number and thre times the first number is 49. find the numbers
Click here to see answer by ichudov(507)  |
Question 311090: Please help with title: solving systems by elimination
A chemist has a beaker of a 3% acid solution and a beaker of a 7% acid solution. He needs to make 75ml of a 4% acid solution. complete the table.
3% solutiom + 7% solution = 4% solution
Amt of solution x + y =
Amt of acid (ml) ____x + ____y =
Click here to see answer by checkley77(12844) |
Question 311617: x pounds of candy valued at $3.50 Per pounds is mixed with y pounds of candy valued at $4.30 per pound to produce 10 pounds of a mixture selling for $4 per pound. Fin x and y, the number of pounds of each type
Click here to see answer by mananth(16946) |
Question 313834: solve the systems of equations by the substitution method:
5x-4y+=30-5x
3x+6=x+5y+15
I added 5x to both sides to get all variables on one side and got
10x-4y=30 now I not sure where to go from here to solve for y....Please help!
lilchikcadee@msn.com
Click here to see answer by unlockmath(1688)  |
Question 314398: Please explain to me the steps in this equation. I am so lost and really would like to be able to do equations like this. Credit goes to http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut7_factor.htm#pst
9x^2-30xy+25y=
3x^2(3x)(5y)+(5y)^2=
(3x-5y)^2
Click here to see answer by stanbon(75887) |
Question 314781: Mrs Gonzalez bought centerpieces to put on each table at a graduation party. She spent $31.50. There are 8 tables each requiring either a candle or vase. Candles cost $3 and vases cost $4.25. How many of each type did she buy?
Click here to see answer by Fombitz(32388)  |
Question 314889: I have a word problem that am having trouble figuring out how to work it out to come up with the answer.
Randy invested his inheritance in an account that paid 6.1% interest, compounded continuously. After 5 yrs. he found he now had 51,426.94. what was the original amount of his inheritance?
Possible answers: 38,908; 36,908; 23,123.88;37,908
please show work...this is very hard for me as I have never been good at math. Thanks in advance.
Click here to see answer by solver91311(24713)  |
Question 314890: this word problem uses a formula that the book talked about very briefly and I did not understand it...N=Iekt,where n = number of items in terms of the initial population, I, at time t, and k is the growth constant equal to the % of growth per unit of time
an artifact is found at a certain site. If it has 65% of the carbon-14 it originally contained, what is the approximate age of the artifact?
(carbon-14 decays at the rate of 0.0125% annually)
please show work so I can understand this formula better and how to do the problem.
THANKS IN ADVANCE
Click here to see answer by nerdybill(7384)  |
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