Questions on Algebra: Proportions answered by real tutors!

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Question 515925: Choose the best estimate for the following temperatures.
a. A good day to go skiing:-5 C, 15 C, or 35 C?
b. Treat yourself for a fever: 29 C, 39 C, or 99 C?
Click here to see answer by rfer(16322)

Question 515934: The mass of one electron is 9.11 X 10(-28) grams. A uranium atom contains 92 electrons. Find the total mass of the electrons in a uranium atom.
Express your answer in scientific notation.
Click here to see answer by Alan3354(69443)

Question 515985: how do you solve this:
2.3:3:____
�variable is empty... not an equation

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Question 516265: Two numbers are in ratio of 7:11. If 7 is added to each of the number, the ratio becomes 2:3. Find the numbers.
Click here to see answer by Maths68(1474)

Question 516265: Two numbers are in ratio of 7:11. If 7 is added to each of the number, the ratio becomes 2:3. Find the numbers.
Click here to see answer by gc2000(22)

Question 516638: h\30=2\5 ?? help!
Click here to see answer by oberobic(2304)

Question 516637: i dont understand how to do any of these problems i cant understand my teacher when she explains it to me so can you please explain it to me so i can understnd
Click here to see answer by richard1234(7193)

Question 516667: 8 is 20% of what number?
Click here to see answer by rfer(16322)

Question 516660:
12 is 6% of what number?
Click here to see answer by rfer(16322)

Question 516728: can you show me how to solve this proportion? 7/9 = b/b-10

Click here to see answer by mananth(16946)

Question 518980: Jessica purchased x shares of stock at $32 per share. She sold all the stock for $56 per share and made a profit of $552. How many shares did Jessica purchase?
Click here to see answer by jessica43(140)

Question 519196: How would you solve 4y-8-2y=4?
Click here to see answer by algebrahouse.com(1659)

Question 519299: if a,b,c,d are in continued proportion, prove that (a+b)(b+c)-(a+c)(b+d)=(b-c)^2
Click here to see answer by Edwin McCravy(20055)

Question 519546: the ratio of the length of a rectangle to its breadth is 9:4. if the perimeterof rectangle is 104cm, find the area of the rectangle.
Click here to see answer by oberobic(2304)

Question 519809: what is the solution to 4/9=r-3/6
Click here to see answer by jim_thompson5910(35256)

Question 519809: what is the solution to 4/9=r-3/6
Click here to see answer by Alan3354(69443)

Question 521267: Depakote is a medication whose purpose is to reduce the pain associated with migraine headaches. In clinical trials of Depakote, 2% of the patients in the study experienced weight gain as a side effect. Suppose a random sample of 30 Depakote users is obtained. Find the following probabilities:
a. Exactly 3 experienced weight gain as a side effect
b. 3 or fewer experienced weight gain as a side effect
c. 4 or more experienced weight gain as a side effect.
d. Between 1 and 4 patients, exclusive, experienced weight gain as a side effect.
Click here to see answer by stanbon(75887)

Question 521581: A car going 65 miles per hour traveled 15 miles farther tahn a car traveling 55 miles an hour in the same time. How far did each car travel during that time?
Click here to see answer by josmiceli(19441)

Question 522388: how do you find a proportion. 12% of 17
Click here to see answer by stanbon(75887)

Question 522790: How do I do this problem?
Eugene bought 27 comics and 12 magazines for $126. If 3 comics cost as much as 2 magazines, find the cost of each comic.
Click here to see answer by Maths68(1474)

Question 524048: HI
Click here to see answer by Alan3354(69443)

Question 524658: A blueprint shows the master bedroom to be 5 inches long and 3 inches wide. The scale on the blueprint is 2 inches for every 11 feet. What are the actual length and width of the master bedroom?
Click here to see answer by solver91311(24713)

Question 524684: Mary,Bob, and Dylan contributed money to the college fund in the ratio of 3:5:8. If they contributed $464, how much did each person contribute to the fund?
Click here to see answer by solver91311(24713)

Question 524715: the scale on a blueprint is 1/2 inch for every 6 feet. the height of the living room ceiling is shown as one and a half inches on the print. how high should the living room ceiling really be?
Click here to see answer by edjones(8007)

Question 525559: total of three numbers is 174. If the ratio between 1st and 3rd number is 1:4. And the ratio between 2nd and 3rd number is 9:16. Then what is the 2nd number?
Click here to see answer by ankor@dixie-net.com(22740)

Question 525810: Help with this question please:
0.05:x as 0.15:30
Click here to see answer by Tatiana_Stebko(1539)

Question 526211: The costs incurred by a trucking company vary jointly with the number of trucks in service and the number of hours they are used. When 4 trucks are used for 6 hours each, the costs are $1800.
a)Find the costs of using 19 trucks, each for 12hours.
Click here to see answer by richwmiller(17219)

Question 526671: statistics question. what is the probability of matching the letter if you have a ticket with two numbers an one letter. show formula
Click here to see answer by stanbon(75887)

Question 526822: If the width(x) of an object is 3 and the length(y) is 4 on a chart, then what would be the length(y) of an object if the width(x) is 1?
I have tried many times, but I just can't get it right. At first, I figured out a half of 3, but I thought it might not have even been relavant. I also have tried to figure out what the length(y) of an object is, if the width(x) was 6, and I got 8. This would be a real big help.
Thank you for your time
Click here to see answer by ankor@dixie-net.com(22740)

Question 528280: Hi my name is Tamika. I am currently in the seventh grade. On one of my homework problems i didnt understand, please get back to me as soom as possible.: )
x 4
- = -
15 8
Click here to see answer by stanbon(75887)

Question 528354: what is 7/x=9/10

Click here to see answer by Alan3354(69443)

Question 528448: 2/x=16/40=
Click here to see answer by jim_thompson5910(35256)

Question 529802: Please help with this question. My son needs help. Thank you so much!
Question:
Two rectangles are similar. One is 5 cm by 12 cm. the longer side of the second rectangle is 8 cm greater than twice the shorter side. find its length and width.

Click here to see answer by jim_thompson5910(35256)

Question 529859: Hi, I have a problem. I have been learing about proportions for a while, but I just can't get it. The problem is:42 is 30% of what number?
Click here to see answer by ankor@dixie-net.com(22740)

Question 530069: 12+121
Click here to see answer by jim_thompson5910(35256)

Question 530504: Hi,
my question is....
a falcon flew 16 2/3 miles in 5 minutes. what is this speed in feet per second. round your answer to the nearest tenth.
thx! :)
Click here to see answer by stanbon(75887)

Question 530532: the scale on a map of Virginia shows that 1 cm represents 30 miles. the actual distance from richmond, VA to Washington, DC is 110 miles. one the map, how many cm are between the 2 cities. round your answer to the nearest tenth.
Click here to see answer by stanbon(75887)

Question 530518: a map of Indiana is being made to a scale of 1/2 in: 20 mi. Indianapolis is 128 miles from fort wayne. how far apart from each other will they appear on this map?
Click here to see answer by rfer(16322)

Question 530514: a model of a building was built to a scale of 1:65.5. one side of model is 23 inches long. how, long in feet, is this side of the actual building? round to the nearest tenth.
Click here to see answer by rfer(16322)

Question 530523: a giraffe can run 32mph. what is this speed in feet per second? round your answer to the nearest tenth.
Click here to see answer by josmiceli(19441)

Question 530913: ``Hi,
my question is....
sam is building a model of an car. the scale of his model to the actual car is 1:10. his model is 18 1/2 inches long. how long is the actual car?
thx! :) ''.
Click here to see answer by oberobic(2304)

Question 531732: Shane's neighbor pledged $1.25 for every 0.5 miles that Shane swims in the charity swim-a-thon. If Shane swims 3 miles, how much money will his neighbor donate?
Click here to see answer by stanbon(75887)

Question 531727: Barbara's goal is to practice piano 20 minutes for every 5 minutes of lessons she takes. If she takes a 20 minute piano lesson this week, how many minutes should she practice this week?
Click here to see answer by josmiceli(19441)

Question 531751: The measure of two supplementary angles are in the Ratio 11:13. Find the measure of each angle.

Click here to see answer by oberobic(2304)

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