Tutors Answer Your Questions about expressions (FREE)
Question 250489: Use the formula N = Ie^(kt), where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. A certain radioactive isotope decays at a rate of 0.275% annually. Determine the half-life of this isotope, to the nearest year.
Click here to see answer by Theo(13342)   |
Question 250488: Evaluate the exponential equation for three values of x greater than -4, three values of x smaller than -4, and at x = -4. Show your work. Use the resulting ordered pairs to plot the graph; State the equation of the line asymptotic to the graph (if any).
y= 3^(x+4)-1
Click here to see answer by MRperkins(300)  |
Question 253126: honestly, i don't know if i classified this right. i don't remember how to do problems with a ration in the bottom and top of a fraction. the problem is 8/10-x/2. do i need to multiply the whole fraction by two, or just the bottom
Click here to see answer by stanbon(75887) |
Question 253126: honestly, i don't know if i classified this right. i don't remember how to do problems with a ration in the bottom and top of a fraction. the problem is 8/10-x/2. do i need to multiply the whole fraction by two, or just the bottom
Click here to see answer by richwmiller(17219)  |
Question 253904: Here is an equation i am trying to simplify:
4x^2-3x^2+5x-x^2-1 (where x is a variable and ^2 is an exponent of 2)
i came up with 5x-1 as the simplified form. However, when i substitute a number for x the two equations don't equal the same thing.
Click here to see answer by jim_thompson5910(35256) |
Question 254890: For business purposes Mr. John Smith wants to determine the difference between the costs of owning, and renting an automobile. He can rent a car for $140 per month on an annual base. Under this plan his cost per mile for gas and oil is $ 0.05. If he were to purchase the car, his fixed annual expense would be $ 1000 and other costs would amount to $ 0.1 per mile. What is the least number of miles he would have to drive per year to make renting no more expensive than purchasing? Approach the questions using EXEL.
Click here to see answer by CharlesG2(834) |
Question 256560: I am having a hard time understanding the concept of putting like terms together to solve the following problem, the brackets and parentheses are really throwing me off. I understand the PEMDAS concept but I can't quite comprehend the procedure for working problems such as this. I am not asking for an answer, but a step by step explanation so that I can learn to do this on my own. Thank you in a advance for any insight you can give me.
Simplify:
5a – {6b – 4[2a – (3 – b)]}
Click here to see answer by checkley77(12844) |
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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
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