Questions on Algebra: Equations answered by real tutors!

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Question 294827: Factor 2x^2z + 5xz - 12z
Click here to see answer by scott8148(6628)

Question 295092: -5/8-6/-5

Click here to see answer by unlockmath(1614)

Question 295097: 3/5x=3/7
Click here to see answer by rfer(12730)

Question 295110: -9w+4=-10+3w
Click here to see answer by rfer(12730)

Question 295117: How would I solve the equation 1/8 = -1/8 + r

Click here to see answer by richwmiller(9144)

Question 295048: the difference between 2 numbers is 16. their sum divided by 2 is larger than one of the 2 numbers. the sum of the 2 numbers is 30.
I cant seem to solve this AT ALL.
Click here to see answer by richwmiller(9144)

Question 295209: I am struggling with some of these problems please help

Solve each system by substitution:
(b) y = 13x + 14
x = y - 1
John
Click here to see answer by stanbon(57977)

Question 295209: I am struggling with some of these problems please help

Solve each system by substitution:
(b) y = 13x + 14
x = y - 1
John
Click here to see answer by richwmiller(9144)

Question 295215: Convert to a Scientific Notation 6,800,000
Click here to see answer by dabanfield(803)

Question 295222: I asked a friend of mine who is proficient in math to help me with this well needless to say she has no idea. Any help would be greatly appreciated. I know we can only post 4 problems a day the problems I am submitting are homework for college however not graded. Our homework is optional for us to do, I chose to do it in order to learn so I am able to do the test at the end of the term. I want to make that clear so the tutors dont think I am looking to have people do my homework for me for a grade. These problems are not graded. Thanks for the help

A new farm pond was stocked with 2500 crappies in 2003. The crappie population in 2006 was found to be 4320.
a) Let t be the number of years after 2003 (in other words t = 0 corresponds to 2003). Write down the initial crappie population at t = 3.
b) Find the growth function of the form f(t) = y0 bt that gives the crappie population t years after 2003. The function you have found models _________________________.
c) Predict the crappie population in 2010.
d) In what year will the crappie population reach 13,000? Give the exact value for t and then use your calculator to approximate t to get the year.
e) Are your answers for (c) and (d) consistent with the given population data in your answer to (b)?

John
Click here to see answer by richwmiller(9144)

Question 295227: Solve the unknown in 2/x = 6/21????? Please help.....
Click here to see answer by Alan3354(31532)

Question 295232: 5 years ago, bob was 2/3 mary's age. In 10 years, he will be 5/6 her age. How old is bob now?
a. 10 b. 15 c. 20 d. 21
How is this set up and how is it solved?
Click here to see answer by richwmiller(9144)

Question 295294: I am doing mathbits caching. I have complete all the others but am having trouble on #9. I have been working on this for 2 days
x+2/2-y+4/3=4
x+y/2=1/2+x-y/3
Click here to see answer by richwmiller(9144)

Question 295330: Find all real soultions.
x^2+30x + 200 = 0
x^2 + 3x + 1 = 0
X^2- 6x + 1 = 0
3x^2 + 7x + 4 = 0
Click here to see answer by jim_thompson5910(28717)

Question 295502: 4(13-x)=9x-(x-5)
Click here to see answer by alicealc(281)

Question 295604: 5/8=v/7 Solve the following proportion for v, round your answer to the nearest tenth
Click here to see answer by jim_thompson5910(28717)

Question 295569: When dealing with Functional Relationships I need to know what the equation to represent each function is with the table provided. The table is an input/output table. The input numbers are: 5, 6, 7, 8, and 9. The output numbers are: 5, ?, 9, 11, and 13. I know that the ? is 7, just by the pattern. What I don't know is what equation could I write to give me that in every instance?
Click here to see answer by richwmiller(9144)

Question 295662: If I am going to solve a problem by completing the square, how would I know what to add to both sides?
Click here to see answer by richwmiller(9144)

Question 295713: Susan can paint a house in 4 hours. James can paint the same house in 6 hours. How long will it take to paint the house if Susan and James work together?

Click here to see answer by Aust05(12)

Question 295867: The diagonal of a squars is 2 m longer than a side. Find the length of a side?

Click here to see answer by JBarnum(2044)

Question 295871: Find the exact volume of a cube with sides of length sqrt of 3 meters?
Click here to see answer by stanbon(57977)

Question 295988: I do not understand how to do it. Thanks!

Click here to see answer by richwmiller(9144)

Question 295986: I have a homework problem that I am stuck on can someone help me with solving this problem step by step? Thanks again.
Elvauate {4(3-6} + 10}^2 divided by (-4) -3^3
Click here to see answer by richwmiller(9144)

Question 296036: 28 = x
Click here to see answer by richwmiller(9144)

Question 296139: A lumber yard can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of $20 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $11440?
Click here to see answer by richwmiller(9144)

Question 296274: The population of a small town at the beginning of the year was 7,000. Records show that during the year there were 5 births, 7 deaths, 28 new people moved into the town, and 12 moved out. what was the percent of increase or decrease in the town population?
My question is, how do you calculate percent increase or decrease?
Click here to see answer by richwmiller(9144)

Question 296381: You currently have $15 and plan to save $5.50 per week. Your friend has $30 and plans to save $3.25 each week. When (at what same time) will you have the same amount of money as your friend?
I have to explain how I solved the problem and show as many stratergies as I can.
Click here to see answer by checkley77(12569)

Question 296469: what is the equation of -7.7x + 1.7 = -62.3 - 1.3x into fractions if possible
Click here to see answer by Alan3354(31532)

Question 296469: what is the equation of -7.7x + 1.7 = -62.3 - 1.3x into fractions if possible
Click here to see answer by stanbon(57977)

Question 296465: How do I solve the equation of 7x-5+5x+5=-2x+6? It should be converted into a fraction. If possible.
Click here to see answer by Alan3354(31532)

Question 296470: please help me find the equation to this. 14(6x-6)=9x-9
Click here to see answer by stanbon(57977)

Question 296480: A certain number is added to 6 and the result is multiplied by 25. The final answer is 50. Find the number.
Click here to see answer by richwmiller(9144)

Question 296503: Karl said if I divide my dogs age by 4 and subtract 2. I'll get the same result as when I divide my dogs age by 8.
Write an equation and solve
Click here to see answer by mananth(12270)

Question 296615: Please help me solve this equation:

Click here to see answer by Alan3354(31532)

Question 296671: 4-7a=25 for a = 25
Click here to see answer by checkley77(12569)

Question 296663: how do I solve 4/X=2
Click here to see answer by jim_thompson5910(28717)

Question 296645: Any help on this problem would be great

Solve for the variable
2(y – 1)^2 = 4(y + 1)^2
ERic
Click here to see answer by jim_thompson5910(28717)

Question 296707: I do not know how to solve (0,0) m= 5/11. The answer must be written in Ax+By=C
Click here to see answer by stanbon(57977)

Question 296845: Math problem - Gym members pay $3 per workout with a one time membership fee of $98. Nonmembers pay$10 per workout. How many workouts would both a member and a nonmember have to do to pay the same amount?
Click here to see answer by checkley77(12569)

Question 296944: 9 is the same as a number divided by 3 decreased by 21. Please put in algerbraic equation and solution..
Click here to see answer by dabanfield(803)

Question 296973: An excursion boat takes 2hours longer to go 45miles up a river than to return. If the boat's speed in still water is 12miles per hour, what is the speed of the current? Use T for time and x for the current.
Click here to see answer by dabanfield(803)

Question 297018: 7^(x+8)=6^x
(the answer must be rounded to three decimal places).
Click here to see answer by stanbon(57977)

Question 297050: 13+2(5c-2)=29 how to solve

Click here to see answer by richwmiller(9144)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 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