Tutors Answer Your Questions about Functions (FREE)
Question 147397: If I am at the gas station filling my tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation, what does the number 3.03 represent? What would C(2) or C(9) be?
If I graph C(g), what would be an appropriate domain and range be?
Click here to see answer by stanbon(75887)  |
Question 147473: 1. If f(x)=-x^2-4x+3, find f(-2)
2. Solve for x: 3(x-2)=-4(x+8)+10
3. State the domain of f(x)=x/x-4
4. Write the equation of the line whose slope is -3/7 and y-intercept is -4; write the answer in slope-intercept form.
text is College Algebra
Click here to see answer by edjones(8007)  |
Question 147711: I need help!
1. write the equation of a line whose slope is -2 and passes through (-1,6). Write answer in slope-intercept form.
2. Solve for x: (2x-7)(x+4)=0
3. find the vertex of f(x)=3x^2-6x+8
4. find the y-intercept of the cubic f(x)=(x-2)(x+1)(x-3)
Click here to see answer by stanbon(75887) |
Question 147711: I need help!
1. write the equation of a line whose slope is -2 and passes through (-1,6). Write answer in slope-intercept form.
2. Solve for x: (2x-7)(x+4)=0
3. find the vertex of f(x)=3x^2-6x+8
4. find the y-intercept of the cubic f(x)=(x-2)(x+1)(x-3)
Click here to see answer by mangopeeler07(462) |
Question 147813: Hello, Need help finishing my assignment. i am stuck on a domain question?
Find the domain of the following: f(t)= log(t-5) I answered ( is all positive values such that (t-5)>0 or t>5. Is this correct?
g(x)=5e^x I answered all real numbers except 0?
g(x)= ln(x+4) i don't know this one
g(t)=5^t I answered all real numbers except 0
Please help. Thank you.
Click here to see answer by jim_thompson5910(35256) |
Question 147856: You have helped me a few times and I greatly appreciate all I can get, here is some more questions I am stuck on
1. f(x)=2x^2-x+7;g(x)=x-1 find (f-g)(x)
2. f(x)=x^2+3;g(x)=+4; find (fog)(-2)
3. if f(x)=2x-4, find f^-1(x)
4. using the compound interest formula A=P(1+r/n)^nt, find A when P=$1000, r=6%, t=5 years and n=4
Click here to see answer by stanbon(75887) |
Question 148022: I need some help on these problems.
1. y varies directly as x and inversely as the square root of w; write the sentence as an equation.
2. write 3^x=y in log form.
3. write log 2^x=y in exponential form.
4. solve for x; 5x/6-x/3=1/6
thanks for the help
Click here to see answer by stanbon(75887) |
Question 148022: I need some help on these problems.
1. y varies directly as x and inversely as the square root of w; write the sentence as an equation.
2. write 3^x=y in log form.
3. write log 2^x=y in exponential form.
4. solve for x; 5x/6-x/3=1/6
thanks for the help
Click here to see answer by jim_thompson5910(35256) |
Question 148258: John increased the area of his garden by 120 ft^2. The original garden was 12 ft. by 14 ft., and he increased the length and the width by the same amount. Find the exact dimensions of the new garden and approximate the dimensions in feet and inches.
Click here to see answer by jim_thompson5910(35256) |
Question 148266: Here is four questions that I need help with.
1. if log 90=x, then x=
3
2. if [x+2]=5, solve for x
3. given the following linear equations:
2x+3y=10
4x-6y=-28
solve for (x,y) if there is a solution.
4. Multiply the complex numbers (3+2i)(3-2i)
thanks for your help
Click here to see answer by Alan3354(69443)  |
Question 148454: The concentration, in parts per million, of a particular drug in a patient's blood x hours after the drug is administered is given by the function
f(x)=-x^4+13x^3-47x^2+99x
How many hours after the drug is adminstered will it be eliminated from the bloodscream?
I used x=-b/2a and came up with 6. The answer was incorrect.
Click here to see answer by scott8148(6628)  |
Question 148556: I need an example of a function using a set of at least 4 ordered pairs. The DOMAIN will be any four integers between 0 and +10. The RANGE will be any four integers betwen -12 and +5
I also need an example of at least 4 ordered pairs that DOES NOT model a function. The DOMAIN will be any four integers between 0 and +10. The RANGE will be any four integers between -12 and +5.
Click here to see answer by oscargut(2103)  |
Question 148691: The domain of a function is restricted x > 0. Which of the following functions possesses an inverse function with such a restriction on the domain? (Select all that apply)
f(x)= (x-5)two the second power
f(x)= (x + 5) to the second power
f(x)= square root
f(x)= square root x+5
f(x)= x to the second power + 5
f(x)= x to the second power
Click here to see answer by oscargut(2103) |
Question 149490: Could someone help me with Exponents? I have two scenarios. Thanks.
Do exponential functions only model phenomena that grow, or can they also model phenomena that decay? Explain what is different in the form of the function in each case.
A cell divides into two identical copies every 4 minutes. How many cells will exist after 3 hours?
Click here to see answer by stanbon(75887) |
Question 149825: I have completely forgotten anything that has to do with finding the domain, the range, and if there a set of points is a function. Can you please help me by explaining it to me? Here is a set of points that I need to identify the domain, the range, and tell whether it is a function or not: {(2,3),(3,7),(5,-1),(0,0). Please, someone clarify this for me!
Click here to see answer by vleith(2983) |
Question 150381: If f(x)={(3,5), (2,4), (1,7)} and h(x)= {(3,2), (4,3), (1,6)} then what is f(h(4))?
Click here to see answer by stanbon(75887) |
|
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
|
