Questions on Algebra: Proportions answered by real tutors!

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 Algebra: Proportions Solvers Lessons Answers archive Quiz In Depth

 Question 171708: What type of solution do you get for quadratic equations where D < 0? Give reasons for your answer. Also provide an example of such a quadratic equation and find the solution of the equation Click here to see answer by stanbon(57979)

 Question 171752: How do I write the following in simplest form? 5 3/5 to 2 1/10 Click here to see answer by Alan3354(31534)

 Question 171905: Hello, to anyone that can help, this is a story problem and the bane of my existance. I will be appreciative to anyone who can help. Here it is: To estimate animal populations, biologists count the total number of animals in a small section of a habitat. The total population of animals is directly proportional to the size of the habitat (in acres) polled.First we are asked to a write an equation using only one variable that could be used to solve for the constant of variation k. Then it says that they surveyed 100 miles of ground and found 12 deer. They want the constant of variation k. And the third part to the question: if the entire nature preserve is 2,500 acres, then what is the total white tail deer population in the preserve? I think that the first question might be y=kx? But I can't be sure and then I cannot figure out how that affects problem number two. I think the third one is just a simple ration or proportion equation that would be 100/12=2500/x which would make x 300. Again not sure, and can't figure out how this fits in with the first two parts of the question. Please help, and thank you in advance Click here to see answer by Mathtut(3670)

 Question 172297: One batch of cookies calls for 2 cups of sugar. how much sugar is needed to make two and a half batches of cookies? Click here to see answer by Mathtut(3670)

 Question 172299: Twenty-four people at the party had a piece of cake. this was 80% of the people that attened the party. How many people attended the party? Click here to see answer by Mathtut(3670)

 Question 172647: To create a model of the Eustachian tube of the human ear, an audiologist used the scale 1.5cm = 0.6mm. If the diameter of the Eustachian tube is 1.8mm, what is the diameter of the model? Click here to see answer by Alan3354(31534)

 Question 172838: Kim was selected class president. She received 3 votes for every 2 that Amy got. No one else ran. However, if 8 of the people who voted for Kim had voted for Amy instead, Kim would have received only 1 vote for every 2 that Amy would have gotten. How many people voted? Click here to see answer by Mathtut(3670)

 Question 163481: The annual cost in dollars for removing p% of the toxic chemicals from a town’s water supply is given by the formula C(p) 500,000/100-p a) Use the accompanying graph to estimate the cost for removing 90% and 95% of the toxic chemicals. b) Use the formula to find C(99.5) and C(99.9). c) What happens to the cost as the percentage of pollutants removed approaches 100%? Click here to see answer by checkley77(12569)

 Question 173279: how do you get the answer to this problem? 1 - + 5=10 x Click here to see answer by Alan3354(31534)

 Question 173422: compute x such that a straight line passing thru (2,x)and x-2)has has a slope of -2/3 Click here to see answer by Alan3354(31534)
 Question 173422: compute x such that a straight line passing thru (2,x)and x-2)has has a slope of -2/3 Click here to see answer by gonzo(654)

 Question 173998: lewis won the election for class president by a ratio of 5 to 3. there were a total of 168 votes cast in the election. how many people did not vote for lewis? Click here to see answer by Mathtut(3670)

 Question 161870: Cindy's job is to check computer printers for defects. Out of 420 printers she has to check, only 3 of the first 84 have been defective. Using this information, what is the best prediction of the total number of printers in this group that will be defective? I know that 420/84 is 5 and that 5x3=15, but how do you set up the problem? Click here to see answer by actuary(112)

 Question 175246: what is n if one eigth = what sixteenth Click here to see answer by stanbon(57979)

 Question 175669: I need this question awnsered right away! I struggle with math. 99 is what percent of 150 lesson 7-8 pre-algebra course 2 Glenco Mathematics pg582 please Click here to see answer by ankor@dixie-net.com(15746)

 Question 175753: if 4% of a number is z, then what is 50% of the number? Click here to see answer by stanbon(57979)
 Question 175753: if 4% of a number is z, then what is 50% of the number? Click here to see answer by Mathtut(3670)

 Question 175996: If a cylinder has a raius of 3 cm and a length of 10 cm. and every dimension of the cylinder is multiplied by 3 to form a new cylinder. How is the ratio of the volumes related to the ratio of the corresponding dimensions? Click here to see answer by Alan3354(31534)

 Question 176133: Hi there. I'm currently trying to complete an assignment and the first question has me stumped. I've tried looking up how to do it, tried ratio etc and can't for the life of me work out the formula I'm meant to use. The question as printed is as follows: 'A commercial developer is considering three brown field sites on the perimeter of Leeds city centre. All plots are being sold by Leeds City Council at prices such that plot A is £20 000 less than plot B, and plot B is £ 30 000 more than plot C. The sale of the three plots will generate an income of £3 190 000 for the council. Determine the sale price for each plot.' Thanks in advance for your help. Click here to see answer by gonzo(654)

 Question 176091: how do i set up and solve a conversion factor? Click here to see answer by Fombitz(13828)

 Question 176125: why do proportions solve it that way? 767:452=n;342 Click here to see answer by checkley75(3666)

 Question 176797: what is 7 over (a) subtract 4 = 14 over 6 Click here to see answer by Mathtut(3670)

 Question 176944: I am not sure of my answer and I need to be sure. I got u = 16.666... Does that mean there is no answer if the problem reads: 5/3 = u/10 solve for u Thank you for your help. Click here to see answer by stanbon(57979)
 Question 176944: I am not sure of my answer and I need to be sure. I got u = 16.666... Does that mean there is no answer if the problem reads: 5/3 = u/10 solve for u Thank you for your help. Click here to see answer by jim_thompson5910(28717)

 Question 177204: what are the three kinds of proportion and their meanings Click here to see answer by Mathtut(3670)

 Question 177891: for every 15 boys who atendend the program there were 10 girls. how many girls were there if there were 60 boys who atandend in program? Click here to see answer by gonzo(654)

 Question 177964: Does the problem seventy five eighty fifths equals fifteen sixteenths use a proportion? Click here to see answer by Mathtut(3670)

 Question 178158: Along a certain highway, Pearl can average 100 miles in 1.5 hours How long will it take her to drive 150 miles at the same rate? Click here to see answer by Alan3354(31534)

 Question 178288: Greetings: My son asked me for help in resolving this: 3/16+11/15+7+12. I do not want you to resolve the equatiation just if you can point me with guides so i can refresh my memory. or websites that can show me how to understand and resolve this kind of problems I will appreciate it very much. Thanks Click here to see answer by scott8148(6628)

 Question 178372: Find the amount of markup or the amount of discount. Round your answer to the nearest hundreth. \$520surfboard; 20% discount Click here to see answer by nerdybill(7009)

 Question 178529: last month i wrote down the following facts while on my delivery job: i work 5 days a week for 8 hours a day, last month i worked 20 days, my truck gets 21 miles per gallon, i drive at an average speed of 45 miles per hour, i drive about 350 miles per day, gas cost \$3.499 per gallon. how much did i spend on gas last month? Click here to see answer by Mathtut(3670)

 Question 178547: My shower is leaking at a rate of one drop per second. A. how many cups of water per hour are being wasted? B. how many gallons per week? useful conversion; 1gallon = 4 quarts, 4 cups = 1 quart, 1 cup = 16tbsp, 1tbsp = 3tsp, 1tsp = 16drops. Click here to see answer by Mathtut(3670)
 Question 178547: My shower is leaking at a rate of one drop per second. A. how many cups of water per hour are being wasted? B. how many gallons per week? useful conversion; 1gallon = 4 quarts, 4 cups = 1 quart, 1 cup = 16tbsp, 1tbsp = 3tsp, 1tsp = 16drops. Click here to see answer by laflorida(4)