Questions on Algebra: Proportions answered by real tutors!

Tutors Answer Your Questions about Proportions (FREE)

Question 536279: To find out how wide a river is, Jon and Sally mark an X at the spot directly across from the big rock on the other side of the river. Then they walk in a straight line along the river, perpendicular to the straight line between the X and the rock. After walking for 20 feet Jon stops while Sally continoues along a straight line for another 10 feet. Then she makes a 90 degree turn and walks for 30 feet. When she stops and looks at the rock she sees that the straight line from her to the rock passes trought Jon. What is the distance from X?
Click here to see answer by KMST(1868)

Question 536648: Consider two numbers. One of the numbers is 19 more than the other. The sum of their square is 185. Find the numbers

Click here to see answer by mananth(12270)

Question 536648: Consider two numbers. One of the numbers is 19 more than the other. The sum of their square is 185. Find the numbers

Click here to see answer by jee8565(1)

Question 537991: I would like help solving:
1/y-3=3/y-5
Click here to see answer by rfer(12660)

Question 538752: what is the square root of 16 over 64?
Click here to see answer by AluvsHP77(1)

Question 540244: you want to enlarge a photo of you and your friend. Right now it dimensions of 4"[width] by 6"[length]. You want for the length of the enlarged photo to be 8".What should the new width be?
Click here to see answer by abigal95(2)

Question 540287: last year asante drove his car 11,645 miles and changed his oil 4 times. if he drives 5,700 miles this year and changes his oil at the same rate, how many times will he change his oil this year?
Click here to see answer by rfer(12660)

Question 540352: john caught 60 fish on saturday and tagged them all, on tuesday he caught 60 fish, three were tagged. he returned all to the pond. if the percent of tagged fish that john caught on tuesday equals the percent of all the tagged fish in the pond, what is the number of fish in the pond
Click here to see answer by stanbon(57347)

Question 541004: If the ratio of width to length for the U. S. flag is 10 to 19, then how long should a flag be that is 38 inches wide? I'm not sure how to calculate the difference between the 10 and 19 and apply it to the second dimensions.
Click here to see answer by AnlytcPhil(1277)

Question 541107: I need to help my daughter with this question. When iron metal reacts with oxygen, the reaction can form Fe203. The balanced chemical equation I think is right is 4 Fe + 302----2Fe203. So I have 4 moles of iron + 3 moles of oxygen creates 2 moles of iron oxide. I need to find the number of moles of oxygen that are needed to form 6 mol of Fe203. Could you show all work so I can understand? I have looked through internet to try and understand and also in her pre algebra book but the use only h20 so I dont get it. I know 1 mole =6.02*10^23 so confused. Thank you if you can help.
Click here to see answer by KMST(1868)

Question 538635: please express 10:12 as a ratio and also in its
lowest term

Click here to see answer by jim_thompson5910(28595)

Question 542137: How do you round proportions to the nearest hundredth?
Click here to see answer by stanbon(57347)

Question 542156: help me solve this and round it to the nearest hundredth:
3.4/x=2.17/7.7
Click here to see answer by Alan3354(30993)

Question 542279: Jaron is downloading a file. The size of the file is 3200kg. It takes 3 minutes to download the first 1200kg of the file. If the file continues downloading at the sam rate, how many more mintues will it take to finish downloading?
I tried to put the ratio of 3200kg:3min = 1200KG:X I didnt understand where to go next. Thank you for trying to help.
Click here to see answer by neatmath(300)

Question 542324: solve this proportion ; In the typing world, 80 words per minute is considered acceptable. How many words per 30 minutes is this?
Click here to see answer by neatmath(300)

Question 542346: Could someone please help?
I am suppose to solve proportion
28/16=x-8/20
Click here to see answer by stanbon(57347)

Question 542435: solve this proportion: a rainstorm produced a rainfall of 2 inches per hour. How many hours would it take to get a rainfall amount of one foot.
Click here to see answer by neatmath(300)

Question 542482: Sweets were placed in 3 containers, A, B, and C. The ratio of sweets in A and B was 7:4 and the ratio in B and C was 3:2. After 36 sweets were from A, the number of sweets in C was 2/3 the number of sweets in A. What was the total number of sweets left in the three containers?
Click here to see answer by ankor@dixie-net.com(15652)

Question 542800: If a car travels at 55mph covert this speed to meters per second
Click here to see answer by ankor@dixie-net.com(15652)

Question 543781: if a building cast a shadow that is 1,125 meters long how tall is the building

Click here to see answer by stanbon(57347)

Question 543778: 24-8r=6-11r
Click here to see answer by IFY(62)

Question 544824: how would you solve this question. A scale drawing has 1/4 inches scale. The width of a 12 foot room is going to be increased by 4 feet. how much wider will the room be on the drawing?

Click here to see answer by josmiceli(9678)

Question 544858: How do I determine if the quantity of each pair of ratios are porportional in 9/5 = 27/15. My email address is lavernec3@yahoo.com and I am helping my 11 year old son with his home work.
Click here to see answer by saifoo.khan(162)

Question 544864: I can't seem to find the value of x in a ratio problem.
4/x = 7/10
Click here to see answer by saifoo.khan(162)

Question 544864: I can't seem to find the value of x in a ratio problem.
4/x = 7/10
Click here to see answer by fcabanski(874)

Question 545454: how do you solve this.you are 5.5feet tall and cast a 3foot shadow.Your office building cast a 40foot shadow.How tall is the building
Click here to see answer by ankor@dixie-net.com(15652)

Question 545785: nine less than four times a number y
Click here to see answer by saifoo.khan(162)

Question 545815: how can you fin the ratio of x to y:
a. 7x=9y

maria lee
Click here to see answer by vleith(2825)

Question 546332: If a dragonfly flies at a rate of 60 miles in 1 hour how many feet is this per second
Click here to see answer by Alan3354(30993)

Question 546340: 37.5% of 5280

Click here to see answer by Maths68(1474)

Question 546660: Could someone please help with this problem? It is a question on my homework assignment that doesn't have any examples in our book and I have no idea how to do it.
The ratio of a side length of triangle A to a corresponding side length of triangle B is 5:8. Triangle A has a side length of 18 centimeters. Find the corresponding side length of triangle B.
Click here to see answer by scott8148(6628)

Question 546943: If 6 workers can build one house in 3 days, how many workers will it take to build 1 house in one day? Assume all workers work at the same rate. Show your work.
(I know the Answer is 18 but I can't figure out how to do it mathematically instead of logically; ie, showing my work. The teacher was saying something about the "over/under method" but I don't know what that means....)
Click here to see answer by htmentor(789)

Question 547129: Could someone help with this please? Thanks.
The football coach shuddered when he realized that the ratio of the dextrous to the inept was 3 to 7. If 140 players were trying to make the team, how many were dextrous?
Click here to see answer by ankor@dixie-net.com(15652)

Question 547520: Using the scale 1cm: 15cm, find the length of a real car if the toy car is
7cm in length.
Click here to see answer by nyc_function(2733)

Question 547611: the ratio of women to men in class is 3 to 1. How many men are in the class? 3/1.
Click here to see answer by richard1234(5390)

Question 548211: What is the slope of a binomical 2x+3?
Click here to see answer by Alan3354(30993)

Question 548211: What is the slope of a binomical 2x+3?
Click here to see answer by Edwin McCravy(8909)

Question 548551: Ken's car can go 26 miles per gallon of gasoline. The car's gasoline tank holds 14 gallons. How far will he be able to go on a full tank?
Click here to see answer by Alan3354(30993)

Question 548546: find the value that complete each proportion
4 ?
- = -
5 15
Click here to see answer by mananth(12270)

Question 548661: How many times does an adult's heart beat in 270 s?
Click here to see answer by jim_thompson5910(28595)

Question 548717: In how many seconds will a newborn's heart beat 35 times?
Please put in proprotion form I am trying to explain this to my 12 year old daughter. Thanks You guys are the best.
Click here to see answer by stanbon(57347)

Question 549403: If 1/2 in. represents 10 mi on a map,then 10 in. represents how many mi?
Click here to see answer by rfer(12660)

Question 549273: the scale of a detailed map is 1:2000. find the actual area, in square metres, for each of the following areas on the map.
(A)5cm2
Click here to see answer by rfer(12660)

Question 549439: I need help on solving these type of problems
Click here to see answer by mananth(12270)

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