Tutors Answer Your Questions about Rational-functions (FREE)
Question 83566: The book asks for this group of problems to be tested to see if the function is one-to-one. The book gives an explanation of this test, but it is very short and of little help. Can you explain the testing process a little better? For instance, the example the book gives is f(x) = (sqrt x) + 1. It then assigns nonnegative real numbers a & b such that f(a) = f(b). In the end, a = b. How does this work with real problems like (3x+4)/5?
Click here to see answer by nilan(15)  |
Question 84119: How many ways can you select pants, a shirt, and shoes if you have 5 pants, 7 shirts, and 3 pairs of shoes to choose from?
Use a tree diagram to answer the question: How many ways can you select a lunch combo if you have 6 sandwich choices, 3 side choices, and 4 choices for drinks? A lunch combo consists of 1 sandwich, 1 side item, and 1 drink.
Click here to see answer by stanbon(57228) |
Question 84121: How many different two-digit numbers can be formed using the digits 1, 3, 4, and 5. Repetition of digits is allowed.
How many 7-digit phone numbers can be formed if the first digit cannot be 0 and repetition of digits is allowed?
Click here to see answer by stanbon(57228) |
Question 84118: When the discriminant is positive, or b2 - 4ac > 0, expect ___ root(s). Use cardinal numbers (0,1,2,...) to fill in the blank.
When the discriminant equals zero, or b2 - 4ac = 0, expect ___ root(s). Use cardinal numbers (0,1,2,...) to fill in the blank.
When the discriminant is negative, or b2 - 4ac < 0, expect ___ root(s). Use cardinal numbers (0,1,2,...) to fill in the blank.
Click here to see answer by stanbon(57228) |
Question 77847: Science and medicine.
A passenger train can travel 325 mi in the same time a
freight train takes to travel 200 mi. If the speed of the passenger train is 25 mi/h faster than the speed of the freight train, find the speed of each.
thanks
Click here to see answer by vertciel(183) |
Question 84921: I have tried to make sense of this one and it bugs me and is even harder with no graphing calculator.:-(
Page 795: Problem # 56 solve the inequality and graph the solution set on a real number line.
A model rocket is launched from ground level. The function:
S(t) = -16t^2 +48t
Models the rocket’s height above the ground, s(t) in feet, t seconds after it was launched. During which period will the rocket’s height exceed 32 feet?
Click here to see answer by stanbon(57228) |
Question 87129: Ok the problem is functions where the instructions say find f(-3), f(0), f(5)
where f(a)=3/4a -1. Im terrible with fractions. I need help in how to understand the solutions which in the back of the book have:
-13/4,-1,11/4. i get the answer for f(0) but what about the others. help please. im terrible with fractions.
Click here to see answer by longjonsilver(2297)  |
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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
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