Questions on Algebra: Equations answered by real tutors!

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Question 197680: simplify this

2+(-7)

over

-8-5

thank you
Click here to see answer by stanbon(75887)

Question 197690: Hi. I'm not sure what this question wants me to do. Can you help
Express the rule in function notation. (For example, the rule "square, then subtract 5" is expressed as the function f(x) = x^2 - 5.)
Take the square root, add 1, then multiply by 1/8
thanks!
Click here to see answer by jim_thompson5910(35256)

Question 197688: I'm not quite sure what this question is asking, can you help?
Express the rule in function notation. (For example, the rule "square, then subtract 5" is expressed as the function f(x) = x^2 - 5.)
Divide by 7, then subtract 3
f(x)=?
thanks!
Click here to see answer by jim_thompson5910(35256)

Question 197685: simplify

3-5^2

thank you
Click here to see answer by jim_thompson5910(35256)

Question 197694: I'm having some trouble with these two functions
Evaluate the function at the indicated values. (If the function does not exist at a value, enter NONE.)
h(t) = t - 8/t
h(x) = ?
h(1/x) = ?
Click here to see answer by jim_thompson5910(35256)

Question 197696: I'm having some trouble with the following functions:
Evaluate the function f(x) = 7|x + 4| at the indicated values
f(x + 1)=?

f(x^2 + 2)=?
thanks!
Click here to see answer by jim_thompson5910(35256)

Question 197679: state the approximate value of the square root of 27.

4x4 = 16 so four would be 16's square root
Click here to see answer by stanbon(75887)

Question 197719: 1/27=9to the 5x-5 power
Click here to see answer by stanbon(75887)

Question 197794: Hi, I'm not sure what I'm doing wrong in the following problem. I get the answer (-INFINITY,-5][5,INFINITY) but it says it's incorrect, Can you help me?
Find the domain of the function. If the domain can be specified by only one interval, use (NONE, NONE) for the second interval.
f(x) = sqrt(x^2 - 25)
Click here to see answer by solver91311(24713)

Question 197795: I'm not sure what I'm doing wrong in this problem. I got part of the problem but the other half it says it's incorrect can you help me
Find the domain of the function. If the domain can be specified by only one interval, use (NONE, NONE) for the second interval.
g(x) = sqrt(x)/(7 x^2 + 6 x - 1)
thanks!
Click here to see answer by edjones(8007)

Question 197832: The currency exchange table states 1,0000 EUR is equivalent to 0.7615 USD. Use a proportion to convert $2,500 to EUR.

Help! Math is not my strong point at all and I'm so lost. This is my final question and I cannot find proportion anywhere and don't even know where to begin.
Thanks,
Tina
Click here to see answer by solver91311(24713)

Question 197822: A rectangle has vertices at (0,0), (0,-4), (-3,-4), and (-3,0) What is the perimeter of the triangle?

please graph it
Click here to see answer by solver91311(24713)

Question 197885: Express the sum of the fractions x/6 and x/5 as a single fraction.
Click here to see answer by stanbon(75887)

Question 197883: If n represents an odd integer, express the next larger odd integer in terms of n.
Click here to see answer by stanbon(75887)

Question 197907: If x+y=x, what is the numerical value of xy?
Click here to see answer by stanbon(75887)

Question 197753: A math teacher collects old books. One day, a student asked him how many old math books he has. He replied, "If I divide the books into unequal whole numbers, then 64 times the difference between the two numbers equals the difference between the squares of the two numbers." How many old math books does the teacher have?
Click here to see answer by josmiceli(19441)

Question 197877: A Rectangle has vertices at 0,0 0,-4 -3,-4 and -3,0

what is the perimter of the triangle?

graph please
Click here to see answer by Alan3354(69443)

Question 197958: I have to solve the problem: 5/8x + 3/5 = 8
I know I have to multiply each side by 5 but I'm lost after that. Any help would be great!

Click here to see answer by solver91311(24713)

Question 197958: I have to solve the problem: 5/8x + 3/5 = 8
I know I have to multiply each side by 5 but I'm lost after that. Any help would be great!

Click here to see answer by stanbon(75887)

Question 197973: How are addition and multiplication used to solve a linear equation? Demonstrate by solving 12x+6=31-2x
Click here to see answer by jim_thompson5910(35256)

Question 197986: My final exam at school is 15% of my grade. I had an 84% before my Biology exam, but i got a 74% on the exam. What is my new grade?
Click here to see answer by solver91311(24713)

Question 197989: My final exam at school is 15% of my grade. I had an 84% before my Biology exam, but i got a 74% on the exam. What is my new grade?

Please tell me.
Click here to see answer by solver91311(24713)

Question 197946: Value of c=2x-y subject to the constraints:
x>=1
x<=4
y<=8
x-3y<=-2
The last constraint really confuses me. Thanks for your time. Mike
Click here to see answer by jim_thompson5910(35256)

Question 197760: pls help me solve
-4[5[2x+3y]-4[x+2y]]
Thank you ,
Brandon
Click here to see answer by checkley77(12844)

Question 198001: x+3=-5

Click here to see answer by checkley77(12844)

Question 198001: x+3=-5

Click here to see answer by jim_thompson5910(35256)

Question 198003: Solve for x in terms of a, b, and c: ax/c=b.
Click here to see answer by jim_thompson5910(35256)

Question 198079: What amount of each mixture, one 95% alcohol the other 15% alcohol must be used to make 10 liters of a mixture which is 45% alcohol?
Click here to see answer by stanbon(75887)

Question 198009: A boy takes 3 minutes to read a story of 315 words. How many minutes will it take him to read a story of 945 words at the same rate?
Click here to see answer by jojo14344(1513)

Question 198106: My instructor told me that this was an algebra equation but I'm lost...
The question is:
I have dice in my hand and want to know what the probability is of rolling an 8?
Click here to see answer by RAY100(1637)

Question 198105: John and Ben are working on a building project together where they must create a right angle triangle. John has a side that is 3 inches long. Ben has a side that is one inch longer than John's side. How long is the side they are missing?
Click here to see answer by Earlsdon(6294)

Question 198130: If 3 times a number is subtracted from 7 times the same number, the result is 12. What is the number?
Click here to see answer by solver91311(24713)

Question 198135: x/a+y/b+z/c=1, where a,b,c=< 1
Click here to see answer by solver91311(24713)

Question 198131: Solve for y: 3/4y+5=17
Click here to see answer by vleith(2983)

Question 198150: Hi!
A function f is given, and the indicated transformations are applied to its graph (in the given order). Write the equation for the final transformed graph.
f(x) = x^2; stretch vertically by a factor of 2, shift downward 7 units, and shift 8 units to the right
thanks for help!
Click here to see answer by stanbon(75887)

Question 198075: 4ax+by=11ab
8ax-5by=ab solve for x and y
Click here to see answer by arallie(162)

Question 198161: My problem says to:
Solve
8^(x+8) = 32^x
I would appreciate your help! Thank you very much :)
Click here to see answer by josmiceli(19441)

Question 198163: Hi. I'm having some difficulty with this problem, Can you help?
A function is given below. Determine the average rate of change of the function between x = 0 and x = 0 + h.
f(t) = √-3t
thanks!
Click here to see answer by stanbon(75887)

Question 198214: If 3 times a number is subtracted from 7 times the same number, the result is 12. What is the number?
Click here to see answer by solver91311(24713)

Question 198245: factor 24-4a+6b-ab completely. if the polynomial is not factorable, choose prime.
thank you.
Click here to see answer by RAY100(1637)

Question 198246: which of the following values of b, will cause y=8(b)* to represent exponential decay ?
a.3 b. 1/3 c. -3 or d. -1/3
thank you.
Click here to see answer by RAY100(1637)

Question 198295: Hi!
Find f compose g compose h.
f(x) = 1/(-6 x), g(x) = - x^3, h(x) = x^2 - 8
thanks for your help!
Click here to see answer by jim_thompson5910(35256)

Question 198355: I seemed to have made an error in getting the right answer for this problem. Can you help with the right answer?
thanks!
Find the inverse function of f.
f(x)=1/(-8 x^2 - 8),x>=0
Click here to see answer by arallie(162)

Question 197818: Find a function whose graph is the line segment joining the points (-7, -4) and (14, 7)
f(x) = ?
Thanks! Appreciate the help!
Click here to see answer by arallie(162)

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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33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580