1. algebra

    solve by substitution 5x-2y = -5 y - 5x = 3 could someone take a min a show me how to do this problem by steps so i can do the rest of my problems and wait a min so i may ask questions. I m failing my algebra class and desparately need help. 5x-2y = -5 y - 5x = 3 take the ...
  2. Math

    Please help me solve these problem i have no idea how to do this. 720m/d= ____ m/min 1.5gal/min=______ qt/h 32yd/min=_____in./s 0.85km/s=______m/min 80mi/h=_______ft/s 20fl oz/min=_______qt/day
  3. math

    289 min = 4 hr and 49 min 213 min = 3 hr and 33 min 345 min = 5 hr and 45 min 197 min = 3 hr and 17 min I have to change these minutes on the left to hours and minutes. could you check if I have them correctly. Thank you for your help
  4. Math

    Please show me how to solve 32 yd/min = __ in./s
  5. math

    amos is using a computer program to graph the function N(p)=-73p-2818. He wants to see the intercepts. Which minimum values should he use to set up the viewing window? A) X min:-80, Y min:-2500<---- B) X min:-50, Y min:-3000 C) X min:-2500. Y min: -80 D) X min:-3000, Y min:-50
  6. Math

    4018 PTS Billymkhoi HIGH SCHOOL MATHEMATICS 10+5 pts At the instant that a cake is removed from the oven, the temperature of the cake is 350°F. After 10 minutes, the cake's temperature is 200°F. If the temperature of the room is 70°F, how much longer will it take for the ...
  7. Calculus

    RP^2=RQ^2 + QP^2 -2(RQ)*(QP)cosQ (1) QP = 24 (km/min) t (2) Diffentiate both sides w.r.t. the time t: 2 RP* d Rp/dt = 2 t [24 (km/min)]^2 -2(RQ)* 24 (km/min) cosQ (3) Using (1) and (2) you find out what RP is at t = 4 minutes. You plug that into (3) and solve for d Rp/dt. A ...
  8. Physics

    From t = 0 to t = 5.00 min, a man stands still, and from t = 5.00 min to t = 10.0 min, he walks briskly in a straight line at a constant speed of 2.3 m/s. (a) What is his average velocity vavg in the interval 2.000 min to 7.90 min? I found this to be 1.15 m/s (b) What is his ...
  9. chemistry

    A particular radioactive substance has a half-life of 4 minutes. How long will it take for 250 g of this radioactive material to decay to less than 0.1g? 24 min 36 min 40 min 48 min 72 min I got 32 min but that not one of the choices. Please help
  10. accountung

    a fixed mo fee of 22.00 up to 510 min. then .05 per min thereafter if i use less than 510 min i still pay 22.00 per month based on 100 min/ 240 min. 540 min.
  11. math

    Please show me how to solve using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 5 h 20 min to make 4 small center pieces and 7 large centerpieces. How long does it take to make each small centerpiece and each large ...
  12. Pre-Algebra

    Can someone show me how to solve this problem step by step?Here is the problem, 26cm/s= m/min,how to solve it by convert rate suing dimensional analysis.
  13. MATH!!

    TO be on the 1-km race team, Celia must have a mean time less than 5 min 50 secs in 6 tryout games. Her times in 5 races are: 6 min 2 s, 5 min 53 s, 5 min 53 s, 5 min 45 s, 6 min, and 5 min 34 s. WHat itme should Celia aim for in her sixth race to make the team. Is this ...
  14. math

    how to solve this problem: max min(x-y)..... here where the max have written, under it x>=0 is also given. also under min y>=0 is given. Also tell that is this is equals to min max(x-y) ? (same as above under max x>=0, under min y>=0 is given) x and y both in R
  15. Food engineering/biology

    Hey Can anyone help me out with this problem. For part a i understand i plot microbial numbers against time on semi log paper to determine D value for the two temperatures. But i'm unsure how to do part b. Alicyclobacillus acidoterrestris is a quite hat resistant microorganism...
  16. Chemistry

    IF 80mg of a radioactive element decays to 10mg in 30 minutes, the half-life of this element is a.10 min b.20 min c.30 min d.40 min the answer is a.10 min but i would like to know why, please help.
  17. Calc AB

    I've been trying to solve this problem for the past 45 minutes and could really use some help. I'm given that water flows into a tank at a rate of (5t+4) gallons/min. Water flows out of the tank at a rate of 0.5(t^2) gallons/min. At t=0 min the tank contains 100 gallons. The ...
  18. Maths

    A curve has equation y = 10 + 8x + x^2 - x^3. X >= 0 a)Find the coordinates of the turning point. and show whether it is maximum or minimum. b) Hence, Find the area of the region bounded by the curve, the line y = 11x and the y axis? I manage to complete a) which I got : dy...
  19. Science

    Approximately how long does an earhquake P-wave take to travel the first 6500 kilometers after the earthquake occurs? a. 6.5 min b. 8.0 min c. 10.0 min d. 18.5 min
  20. physics

    Sally travels by car from one city to another. She drives for 29.0 min at 63.0 km/h, 37.0 min at 32.0 km/h, and 14.0 min at 26.0 km/h, and she spends 14.0 min eating lunch and buying gas.
  21. physics

    Sally travels by car from one city to another. She drives for 24.0 min at 63.0 km/h, 36.0 min at 45.0 km/h, and 44.0 min at 49.0 km/h, and she spends 13.0 min eating lunch and buying gas.
  22. Trigonometry - LONESTAR

    The figure below is a model of a Ferris wheel. The diameter of the wheel is 191 feet, and one complete revolution takes 15 minutes. The bottom of the wheel is 11 feet above the ground. Complete the table below. (Round your answers to two decimal places.) t H 0 min 11 ft 1.875 ...
  23. Calculus / Rates of Change

    A jet flying due north at 16km/min passes 2 km directly above a plan flying due east at 8km/min. How quickly are they separating when the plane is 32 km from the crossover? What I have done (I am not sure if it is correct.): r^2=x^2+y^2+z^2 Since the plane has gone 32 meters, ...
  24. physical

    From t = 0 to t = 3.30 min, a man stands still, and from t = 3.30 min to t = 6.60 min, he walks briskly in a straight line at a constant speed of 1.76 m/s. What are (a) his average velocity vavg and (b) his average acceleration aavg in the time interval 1.00 min to 4.30 min? ...
  25. physical

    From t = 0 to t = 3.30 min, a man stands still, and from t = 3.30 min to t = 6.60 min, he walks briskly in a straight line at a constant speed of 1.76 m/s. What are (a) his average velocity vavg and (b) his average acceleration aavg in the time interval 1.00 min to 4.30 min? ...
  26. Calculus rate of change

    Can you please check my answers and fix the ones if any that are wrong. Along with help on part d Consider the following fun f(x)=(3/4)x^3- x^3-3x^2+6x A.find relative extrema and identify max and min. I got x=1 max ,±√2 min B.determine the interval(s) where f(x) is ...
  27. physics

    Sally travels by car from one city to another. She drives for 30.0 min at 80 km/h, 12 min at 105 km/h, and 45 min at 40 km/h. She spends 13.0 min eating lunch and buying gas. what the average speed for the trip?
  28. physics

    A person travels by car from one city to another. She drives for 21.8 min at 67.1 km/h, 13.1 min at 84.6 km/h, 51.4 min at 33.5 km/h, and spends 11.5 min along the way eating lunch and buying gas. Determine the distance between the cities along this route.
  29. Chemistry

    Calculate the average disappearance of A between t=0 min and t=10 min in units of M/s. 0 min there are .065 moles of A 10 min there are .051 moles of A 20 min there are .042 moles of A 30 min there are .036 moles of A 40 min there are .031 moles of A The total volume is 100.0 ...
  30. Math 1 question plz help asap

    Write an equivalent time using only the smallest unit. 3hrs 14 min A. 74 min B. 166 min C. 180 min D. 194 min I would give u an answer but I don't understand what the question means im asking if you could help me plz
  31. Math gr 8

    Neil ran 1500 m in 6.5 min. Dario ran 400 m in 1.5 min. Whose average speed was greater? Show work
  32. Chemistry

    Gallium65, a radioactive isotope of gallium, decays by first order-kinetics. The half-life of this isotope is 15.2 min. How long would it take for 7/8 of a sample of this isotope to decay? 15.2 min 30.4 min 45.6 min 48.0 min I'm not sure how to do this. I initially tried by ...
  33. accounting

    paying a fixed monthly fee of $15.00 up yo 240 min then .08 per min if i use less than 240 min still paying 15.00 per mo. based on 100 min 240 min 540 min
  34. statistics

    Can you please tell me how to solve for the following? Pedro took an exam in a class in which the mean was 64 with a standard deviation of 6. If his z score was +3, what was his exam score? A students commute to school is normally distributed with a mean of 31 min and a ...
  35. Calculus, antiderivatives

    A student accelerates from rest at a rate of 3 miles/min^2. How far will the car have traveled at the moment it reaches a velocity of 65 miles/60 min? a(t) = 3 miles/min^2 so v(t) = 3t + k miles/min but when t=0, v=0 so k=0 then v(t)=3t d(t) = 3/2 t^2 + c but when t=0 d, the ...
  36. Physics

    Sally travels by car from one city to another. She drives for 25.0 min at 71.0 km/h, 45.0 min at 45.0 km/h, and 43.0 min at 11.0 km/h, and she spends 10.0 min eating lunch and buying gas. What is the average speed for the trip?what is the total distance traveled?
  37. maths magic

    There are A,B,C,D at one end of the bridge.they have to cross within 17 minutes.only 2 can cross the bridge at atime .since it is very dark one has to come back to show the light and its said that A can cross the bridge in 1 min ,B can cross at 3min ,C in 5 min and D in 10 min...
  38. Physics

    Sally travels by car from one city to another. She drives for 36.5 min at 90.7 km/h, 13.3 min at 120 km/h, and 57.4 min at 45.6 km/h, and she spends 16.3 min eating lunch and buying gas. Find the total distance traveled. Answer in units of km
  39. Physics

    Sally travels by car from one city to another. She drives for 28.0 min at 63.0 km/h, 50.0 min at 40.0 km/h, and 50.0 min at 43.0 km/h, and she spends 13.0 min eating lunch and buying gas. Find the trip's average speed and total distance traveled...
  40. prealgerbra

    how do you solve 45 min/2 mi=?h/1 mi pre algerbra - drwls, Friday, January 6, 2012 at 11:44pm If you go 2 miles in 3/4 hour, you go 1 mile in 3/8 hour (or 22.5 minutes). how do we show are work then
  41. Physics

    Could someone please review my answers and tell me if I am on the right track? Thank you! A student drove to the university from her home and noted that the odometer reading of her car increased by 12.0 km. The trip took 18.0 min. (a) What was her average speed? (b) If the ...
  42. physics

    A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the average speed for the ...
  43. MATH

    SUPPOSE IT TAKES NO MORE THAN 25 MIN FOR YOU TO GET TO SCHOOL. IF YOU HAVE TRAVELED FOR 13.5 MIN ALREADY, HOW MUCH LONGER, AT MOST, MIGHT YOU TAKE TO GET TO SCHOOL? PLS HELP ME. I NEED TO SOLVE AN INEQUALITY THAT MODELS THIS PROBLEM. THANKS
  44. AP CALC. AB

    Two sides of a triangle have lengths 13 m and 17 m. The angle between them is increasing at a rate of 5 degrees/ min. How fast is the length of the third side increasing when the angle between the sides of fixed length is 60 degrees/min? Round the result to the nearest ...
  45. math

    after school chase spends 20 min reading 30 min practicing the piano 15 min cleaning his room, and 40 min doing his homework, chase is busy for 105 min what fraction of the time does he spend cleaning his room?
  46. math - calculus help!

    An inverted conical tank (with vertex down) is 14 feet across the top and 24 feet deep. If water is flowing in at a rate of 12 ft3/min, find the rate of change of the depth of the water when the water is 10 feet deep. 0.229 ft/min 0.449 ft/min 0.669 ft/min 0.778 ft/min 44.90 ...
  47. physics

    A motorist drives south at 26.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.40 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.40 min trip, find the following values.
  48. Accounting

    variable cost, fixed cost, total costif .10 per min long dist calling based on 100 min, 240 min, and 540 min
  49. Chemistry(Please check)

    The units of a rate constant for zero, first, and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction? 1) 1/min^3 2) mol^2/L^2-min 3) L/mol-min^2 4) L^2/mol^2-min 5) L^2/mol^2-min^2 I...
  50. Chemistry

    Calculate the rate constant, k, for the reaction 2H2O2(l) --> 2H2O(l) + O2(g) Using the rate, - 0.02 mol/L.min H2O2, and the initial concentration, [H2O2] = 0.5 mol/L Question 7 options: - 25/min 25/min - 0.04/min 0.04/min
  51. Pre-Algebra

    Can anyone show me step by step how to solve this problem? 26cm/s = m/min convert this problem using dimensional analysis.kj
  52. Pre-Algebra

    Can anyone show me step by step how to solve this problem? 26cm/s = m/min convert this problem using dimensional analysis.What is the answer and how did you get it?Thanks,kj
  53. math

    3 h 20 min 4 h 25 min + 5 h 35 min=13 hrs 20 min 9 lb 15 oz - 5 lb 8 oz=4 lbs 7 oz Mark uses 1 pt 9 fl oz and then 2 pt 10 fl oz from a container of film developer that holds 3 qt. How much of the developer remains?=1 pt 13 oz
  54. math

    3 h 20 min 4 h 25 min + 5 h 35 min=13 hrs 20 min 9 lb 15 oz - 5 lb 8 oz=4 lbs 7 oz Mark uses 1 pt 9 fl oz and then 2 pt 10 fl oz from a container of film developer that holds 3 qt. How much of the developer remains?=1 pt 13 oz
  55. Chemistry

    In a reaction Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq), 6.00 g of Mg was present at 0.00 min. After 3.00 min, 4.50 g of Mg remained. Express the average rate as mol of Mg consumed per minute. I was taught how to use molarity but this question does not tell me molarity, just ...
  56. PreCalc

    y =( (C-A)/2 ) sin( (X - (A - ( (C - A)/2 ) ) )( pi/(C-A) ) ) + (B - ( (B-D)/2 ) How do I rearange this for this equation for the all of the variables including A, B, C, D, X were pi is the greek leter pi if you didn't notice this is the general formula for when you are given ...
  57. Physics

    A nurse counts 72 heartbeats in 1 min. Show that the frequency and period of the heartbeats are 1.2 Hz and 0.83 s, respectively. I responded as: frequency=72hb/min*1min/60sec Is this correct? Thank you
  58. Physics

    Sally travels by car from one city to another. She drives for 40.2 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40.0 km/h. She spends 13.7 min eating lunch and buying gas. (a) Determine the total distance traveled in km. (b) Determine the average speed for the trip ...
  59. Math

    A car travels for 10 minutes. it's velocity is given by v=960t-5t, where t is in minutes and v is in ft/min. Find the maximum speed in ft/min during those minutes. Please help I have no idea how to solve this problem.
  60. math

    2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3. Simplify. Please show all of your work 9c^3+7c-(3c^3-12+c) 4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work 5. Solve the following equation for z. Please show all of your work. x=1/25(...
  61. Biology - Uncertainty (Repost)

    I'm doing a bio lab, and I have collected data on heart rate measured in beats/15 secs with an uncertainty of +/- 1 beat/sec. To get heart rate per minute, I multiplied my data by 4, making my uncertainty +/- 4 beats/min. However, what I need to do now is some subtraction, but...
  62. college-Stats

    A certain geyser was determined to have eruptions with a Mean duration of 3.31 min and a standard deviation of 1.04 min. A sample of n=43 eruptions were recorded. Using Chebychev's Theorem, how many of the eruptions lasted between 1.23 min and 5.39 min. there both 3 sd's away ...
  63. Biology - Uncertainty

    I'm doing a bio lab, and I have collected data on heart rate measured in beats/15 secs with an uncertainty of +/- 1 beat/sec. To get heart rate per minute, I multiplied my data by 4, making my uncertainty +/- 4 beats/min. However, what I need to do now is some subtraction, but...
  64. math

    can you help math question units rates find unit rate for each situation read 50 pages in 1 hr 25 min i got : 50 divide by ttl 85 min and got 0.588 = .59 hike 5 mile in 2hr 10 min i got: 130 min ttl divide 5mile is got 26 mile per min are these right?
  65. math;);)

    During one term in Math 310, Min Lee took seven tests, the last of which carried twice the weight of each of the others when averages were computed. Min’s test-score vector for the term was [84,78,91,80,72,88,83]. Show that Min’s final average, a weighted average, can be ...
  66. math

    After school, Chase spends 20 min reading, 30 min practicing the piano, 15 min cleaning his room, and 40 min doing his homework. Chase is busy for 105 min.What fraction of the time does he spends cleaning his room?
  67. biology lab

    -rate of photosyhthesis in presence of light intensity & CO2. ~A : sodium bicarbonate in darkness pH b4 xperiment-9 " @ 20 min- 8 " 60 min- 8 ~B: sodium bicarbonate in room light pH b4 xperiment-9 " @ 20 min-9 " 60 min-8 ~C: sodium bicarbonate 20 cm from light source pH b4 ...
  68. Math

    Write a proportion for each phrase then solve when necessary round to the nearest hundredth. 1.420 ft2 painted in 36 min;f ft2 painted in 30 min.
  69. chemistry

    a car covers a distance of 200 mile in 3 hours. How many kilometers will it travel in 25.0 minutes? first, convert the 200 miles to km. I get about 320 km. Then, convert the hours to min....I get about 180 min. so you know speed in km/min....divide the distance in km by the ...
  70. Calculs I

    A bacterial population grows at a rate proportional to the population size at time t. Let y(t) be the population size at time t. By experiment it is determined that the population at t=15 min is 16000 and at t=45 min it is 22000. (a) What was the initial population? (b)What ...
  71. physics

    Heather and Matthew walk eastward with a speed of 0.98 m/s. If it takes them 34 min to walk to the store, how far have they walked? If Joe rides south on his bicycle in a straight line for 15 min with an average speed of 12.5 km/h, how far has he ridden? It takes you 9.5 min ...
  72. Chemistry

    Use the data in the table to determine how long it will take for half of the original amount of SO2Cl2 to decompose at the average reaction rate. Experimental Data for SO2Cl2(g) → SO2(g) + Cl2(g) Time (min) [SO2Cl2](M) [SO2](M) [Cl2](M) 0.0 1.00 0.00 0.00 100.0 0.87 0.13...
  73. math

    Jamia is deciding between two long-distance telephone plans: • Plan A charges $5 per month plus 6¢/min. • Plan B charges $20 per month plus 1¢/min. Jamia usually makes about 200 min of long distance calls each month. Which plan costs less? Show your calculations.
  74. physics

    A person travels by car from one city to another with different constant speeds between pair of cities. She drives for 31.5 min at 89.6 km/h, 11.8 min at 101.8 km/h, and 58.5 min at 36.4 km/h, and spends 24.8 min eating lunch and buying gas. Find the distance between the...
  75. Chemistry II (College)

    How would I go about solving this problem? Can someone show me an equation that can be used? The decomposition of dimethyl ether at 504°C is a first-order reaction with a half-life of 27 min. (CH3)2O(g) CH4(g) + H2(g) + CO(g) (a) What will be the partial pressure of (CH3)2O(g...
  76. Science/Anatomy

    I have the formula to the problem but am unsure of my answer.. Problem: Calculate the cardiac output if heart rate (HR) is 90 beats per minute, stroke volume (SV) is 110 ml/beat, end diastolic volume (EDV) is 140 ml, and end systolic volume (ESV) is 30 ml. select corect answer...
  77. physics

    a train starts from rest and accelerates uniformly at 100m/min^2 for 10 min.then it maintains a constant velocity for remaining 20 min.brakes are applied and train uniformly retards and comes to rest in next 5 min. a)the maximum velocity reached b)the retardation in last 5 min...
  78. physics

    a train starts from rest and accelerates uniformly at 100m/min^2 for 10 min.then it maintains a constant velocity for remaining 20 min.brakes are applied and train uniformly retards and comes to rest in next 5 min. a)the maximum velocity reached b)the retardation in last 5 min...
  79. physics

    a train starts from rest and accelerates uniformly at 100m/min^2 for 10 min.then it maintains a constant velocity for remaining 20 min.brakes are applied and train uniformly retards and comes to rest in next 5 min. a)the maximum velocity reached b)the retardation in last 5 min...
  80. Math

    To get a job as a receptionist you have to be able to type 60 words per minute. Trevor wanted to work as a receptionist for the summer so he was working on building up his typing speed. He made the following table to track his progress. Week 0 20 words/min Week 1 26 words/min ...
  81. Math

    Could someone please check my questions? My answers are under the questions... and any help will be greatly appreciated 33. Jane works at the public library after school. She makes $7.00 per hour. She cannot work more than 15 hours per week. If y = 7x represents Jane's earning...
  82. math

    Could someone please check my questions? My answers are under the questions... and any help will be greatly appreciated 33. Jane works at the public library after school. She makes $7.00 per hour. She cannot work more than 15 hours per week. If y = 7x represents Jane's earning...
  83. statistics

    Mean time 79 min Standard deviation 8 min what is the probability of doing it in 60 min or less
  84. physics

    A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the average speed for the ...
  85. physics

    A motorist drives south at 26.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.40 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.40 min trip, find the following values.find displacement, average speed, and average velocity
  86. MAth

    If 1 gallon (gal) of water weighs 8.34 pounds (lb), how much does 3.75 gal weigh? A) 15 lb B) 31.275 lb C) 30.125 lb D) 12.09 lb i think it is D 50. Determine the maximum and minimum values of the following set of numbers. A) Max: 26 / 9 min: - 36 / 7 C) Max: 3; min: -5 B) Max...
  87. physics

    Please help me solve !!! Water flows into a swimming pool at the rate of 9.83 gal/min. If the pool dimensions are 33.4 ft wide, 44.9 ft long and 19.9 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches) Answer in units of min
  88. Please help for my test CALculus

    using the chain rule find the min and max points and their values of the composite function defined by z=x^2+y^2, x=sin(2t), y=cos(t) This is what Ive got so far... dz/dt= 2x*dx/dt+2y*dy/dt =4sin2tcos2t-2sintcost I understand the steps of computing the max and min I just can't...
  89. fizik

    i really need the answer quickly 1. Linda travels by car around one city to another with different constant speeds between pairs of cities. She travels for 35 min at 84 km/h, 17 min at 105 km/h and 50 min at 42 km/h and spends 25.0 min eating lunch and buying gas a) Determine ...
  90. physics

    A figure skater is warming up on the rink. She does a lap of a 100m rink. She completes the laps in 3 minutes. What was her speed? Answer a. 33.3 m/min b. 300 m/min c. 66.7 m/min my answer b.300 m/min ?????
  91. Math--Please Help

    A traverse with five sides has interior angles with the following measures: 121deg 45 min: 118 deg 25 min; 87 deg 32 min; 98deg 34min, and 113 deg 54 min. Does the traverse close? If not, determne the error in the traverse.
  92. Math

    Inez stretched for 19 mins before jogging on a trail. It took her 5 minutes to run each lap around the trail. Write an equation to represent the relationship between the number of laps, l, and time, t. 1 lap= 15 min 2 lap = 30 min 3 lap=45 min 4 lap = 60 min
  93. Physics

    Please help me with the following problem: Joe is on a cross-country trip from New York to Los Angeles. He drives for 45.0 min at 70.0 km/h, 10.0 min at 95 km/h, and 30.0 min at 55.0 km/h, and he spends 20.0 min eating lunch and buying gas. What is the average speed for this ...
  94. algebra

    Help, Can anyone show me how to do the formula to solve these equations? 4x-5y=38 7x-8y=-22 If you can show me the right way to solve, I do not understand how to get the answer.
  95. Math

    Please explain in detail how to solve the following problem using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 6h 20 min to make 4 small centerpieces and 7 large center pieces. How long does it take to make each ...
  96. math

    Jeremy can type 144 words in 144 min. How many words can he type in 10 min at the same rate. Show work
  97. calculus

    A water-trough is 10m long and has a cross-section which is the shape of an isosceles trapezoid that is 30cm wide at the bottom, 80cm wide at the top, and has height 50cm. If the trough is being fi lled with water at the rate of 0.2 m3/min, how fast is the water level rising ...
  98. related rates with work shown

    this is a relate rates problem in calculus in a right triangle, the hypotenuse is 5 and the vertical side is x and the angle is theta. so if theta increases at a constant rate of 3 radians per minute, at what rate is x increasing in units per minute when x equals 3 units? d(...
  99. math

    can someone please help me, Rob is going to college in Oklahoma which is 680 miles from their his home in Tennessee. He can travel on state highways at 55mph or on the interstate at 70mph. Approximately, how much longer will his trip be if he takes state highways? A. 5 hrs 3 ...
  100. Chemistry

    In the reaction 2HgO(s) --> 2Hg(l) + O2(g) we measure the evolution of gas to determine the rate of reaction. At the beginning of the reaction (at 0 minutes), 0.02 L of O2 is present. After 20 minutes the volume of O2 is 0.36 L. What is the rate of reaction? Question 4 ...
  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
  37. 36
  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
  56. 55
  57. 56
  58. 57
  59. 58
  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100