Questions on Algebra: Functions, Domain, NOT graphing answered by real tutors!

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Question 177730: f(x) = 3x__ and g(x) = __2__
X+2 X+2
Should read 3x over x+2 and 2 Over x+2
Find (f + g) (2)
I know I multiple (x) (2)
Where do I go from here?
What is the domain of f+g?
I�m really unsure about this problem.

Click here to see answer by solver91311(24713)

Question 177621: train A and train B are traveling in the same direction on parallel tracks. train A is traveling at 80 miles per hour and train B is traveling at 96 miles per hour train A passes a station at 10:20pm if train B passes the same station at 10:35pm what time will train B catch up to train A?
Click here to see answer by ankor@dixie-net.com(22740)

Question 177782: A student's test score was 684 on a scale of 200-800. Wire a linear equation to convert this score to a scale of 0-100. The test score 684 is equivalent to?
Click here to see answer by stanbon(75887)

Question 177809: Let f(x) = 2x - 1 and g(x) = x� - 1
f( 1 / g(4) ) = ?

Click here to see answer by Mathtut(3670)

Question 177833: f(x)=2x-3
f(k)=f(2k-3)
what is f(4k)
Click here to see answer by Mathtut(3670)

Question 177893: The graph of the function f(x)= x-squared - 3. Find the slope of each of the tangent lines when x=0, x=1, and x=2.
Click here to see answer by stanbon(75887)

Question 177895: Find the range of the function. h(x)=ln(x+6)
Click here to see answer by stanbon(75887)

Question 177896: If a bacteria population starts with 100 bacteria and doubles every three hours, then the number of bacteria after t hours is n=f(t)=100(2 to the t/3 power). When will the population reach 50,000?
Click here to see answer by stanbon(75887)

Question 177947: Starting with the graph of y = e^x, find the equation of the graph that results from reflecting about the line y=5.
Click here to see answer by jim_thompson5910(35256)

Question 177961: Find the domain and range of the functions below:
f(x) = 6/ x+4
g(x) = square root of 1-x(squared)
Click here to see answer by Mathtut(3670)

Question 178036: Please give me the algebraic equation for my paper folding problem:
"As you fold a sheet of paper the number of folds increase by one, but the number of sections doubles. Folds= 1, 2, 3, 4, 5, 6, etc.
Sections=2, 4, 8, 16, 32, 64, etc.
What pattern do you notice? Can you state this rule?" Thanks!
Click here to see answer by HyperBrain(694)

Question 178280: Thank you in advance for your help. I do not understand what I need to do to find f^-1 and verify that (f o f^-1)(x)=x and (f^-1 o f )(x)=x
the equation is
f(x)=x/x+1 for x>-1
Click here to see answer by Earlsdon(6294)

Question 178298: d=1/2 mq
m=
Click here to see answer by jim_thompson5910(35256)

Question 178324: A Michigan orchard made 11,877 lb of Taffy apples, with approximatley 1 pound of taffy mixture for each 61.2 pounds of apples. To the nearest tenth of a pound, how many pounds of apples and how many pounds of taffy were used.
How many pounds of taffy were used.
How many pounds of apples were used.
Round to the nearest tenth.
Click here to see answer by stanbon(75887)

Question 178325: The length of a rectangular boat storage shed must be 4 meters more than the width,and the perimeter must be at least 112 meters. What is the range values for the width.
At least 26 meters
At most 26 meters
Exactly 26 meters
Click here to see answer by jojo14344(1513)

Question 178326: 5/4x + 1/8x 11/8+ x
Click here to see answer by Alan3354(69443)

Question 178303: A minor league baseball team plays 90 games in season. If the team won 14 more than three times as many games as they lost, how many wins and losses did the team have.
How many games did the team lose______
How many games did the team win ______
Click here to see answer by mial_ibanez22(3)

Question 178304: Two minor league baseball players got a total of 224 hits. Washington had 16 more hits than Sanchez. Find the number of hits for each player.
Washington had ___ hits.
Sanchez had ____ hits.
Click here to see answer by Alan3354(69443)

Question 178385: I have just read a section on functions and mapping. They discussed injective, surjective and bijective mapping. I understand the first two but am having difficulty understanding bijective mapping. Please explain with example.
Click here to see answer by ilana(307)

Question 178297: At work one day, Erica Franz received 45 packages, Speedy Delivery delivered three times as many as Ralph's Express, while Ralph's Express delivered five more than Sendquick Package Service. How many packages did each service deliver to Erica.
Speedy delivery
Ralphs Express
Sendquick
Click here to see answer by josmiceli(19441)

Question 178498: 2(2x-8)=4(x-4)
Click here to see answer by jim_thompson5910(35256)

Question 178499: 0.24(12)+0.06x=0.12(6+x)
Solve the equation
Click here to see answer by Mathtut(3670)

Question 178501: 3(x+1)=3(x+7)
Choose the solution
No solution
all real numbers
Click here to see answer by Mathtut(3670)

Question 178502: -6x-8x=-70
The solution is
Click here to see answer by Mathtut(3670)

Question 178503: 9x + 1 <5x-19
x<______
Click here to see answer by Mathtut(3670)

Question 178483: p=a+b+4c, for a
Click here to see answer by Mathtut(3670)

Question 178592: Find f(3), given:
f(x)={3x-5.......x (is less or equal to 1
.......{x-7......x (is less than 1)

(If you can read this right, f(x) goes to both 3x-5 and to x-7. The x's on the right are the regulations of the function
Click here to see answer by Fombitz(32388)

Question 178719: What is the equation for the function in the form f(x)= mx+b?
f(1)=1, f(4)=10
Thank you
Click here to see answer by josmiceli(19441)

Question 178892: Consider the following formula: y=3(x+5)(x-2)
Which of the following formulas is equivalent to this one?
A. y=3x2+9x-30
B. y=x2+3x-10
C. y=3x2+3x-10
D. y=3x2+3x-30
I would like you to show me the steps to solving this problem.
Click here to see answer by jojo14344(1513)

Question 178908: Suppose you have a lemonade stand, and when you charge $2 per cup of lemonade you sell 120 cups. But when you raise your price to $3 you only sell 60 cups. Write an equation for the number of cups you sell as a function of the price you charge. Denote "C" for number of cups, and "P" for the price you charge. Assume the function is linear.

Click here to see answer by ankor@dixie-net.com(22740)

Question 178998: I need help evaluating this function. Given f(x)=1/[x], find f(2)+f(-2) and find f(c^2+4). I don't understand.
Click here to see answer by jim_thompson5910(35256)

Question 178998: I need help evaluating this function. Given f(x)=1/[x], find f(2)+f(-2) and find f(c^2+4). I don't understand.
Click here to see answer by solver91311(24713)

Question 179080: evaluate the function, f(x) = 3-6x-3x(2) for:
a) f(-3) b) f(-1/6) c) f(-y)
Click here to see answer by solver91311(24713)

Question 179180: I am looking for the domain and the range for the equation: x^2+y = 10
I thought that the square root of a negative number was imaginary and, as such we could not have a function from this equation. Apparently, this is not correct. Can you please explain what are and how to find the domain and range here?
Click here to see answer by Mathtut(3670)

Question 179242: page103 #'s 32,34 & 36
Click here to see answer by Alan3354(69443)

Question 179240: page 107 #8,10,18,20 &54
Click here to see answer by Mathtut(3670)

Question 179397: what is the Domain of the function G(F(x))?
F(x) = x + 4, G(y) =
G(F(x)) = x+4

Click here to see answer by stanbon(75887)

Question 179413: A frozen yogurt stand makes a profit of P(x) = $0.50x - 20 dollars when selling x scoops of yogurt per day.
a) Find the break-even sales level, that is, the level at which P(x) = 0
b) Find the The sales level that generates a daily profit of $30
c) Find the number of scoops

Click here to see answer by nerdybill(7384)

Question 179626: how do i solve this problem by stating the domain

G(x)= -----2x+1
x- 7
Click here to see answer by Mathtut(3670)

Question 179681: please help me solve this equation:

Click here to see answer by Alan3354(69443)

Question 179741: find the following a) (f+g)(x) b) (f-g)(x) c)(fg)(x)d)(f/g)(x)
what is the domain of f/g?
f(x)=2x-5, g(x)= 1-x
Click here to see answer by solver91311(24713)

Question 179845: I got 4 for this equation. Is it correct.
-4x-10x=-56
Click here to see answer by stanbon(75887)

Question 179843: -(5y+5)-(-4y-7)=-5
Please help me solve this equation
Click here to see answer by HyperBrain(694)

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, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 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, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660