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Tutors Answer Your Questions about Rational-functions (FREE)
Question 83566This question is from textbook PreCalculus - A Graphing Aproach
: 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?This question is from textbook PreCalculus - A Graphing Aproach
Click here to see answer by nilan(10)   |
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(26291) |
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(26291) |
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(26291) |
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 84921This question is from textbook 
: 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?
This question is from textbook
Click here to see answer by stanbon(26291) |
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
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