Questions on Algebra: Proportions answered by real tutors!

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Question 374269: If y varies as x cubed, what must be the value of x if the value of y is to be doubled?
Click here to see answer by Jk22(389)

Question 374978: One card is randomly selected from a deck of 52 cards. Find the probability of selecting a black card or a prime digit card.
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Question 374989: Express the summation notation. Use i for the index of summation.
2/3+4/5+6/7+----40/41
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Question 374988: Write the first five terms of the sequence whose general term is a(n)+(-2)^n+2/n^2.
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Question 375679: a person wants to sell a 40-fluid-ounce bottle at the same unit rate as the 12-fluid-ounce. how much will that person charge for the 40-fluid-ounce bottle

Click here to see answer by nyc_function(2741)

Question 376254: A dog trainer is building a dog run that measures 9 � 16 feet. If she wants to fence the perimeter of the run, how many feet of chain link fence will she need?
Click here to see answer by checkley79(3341)

Question 376303: write the sentence as a proportion then solve for x.
x is to 8 as 5 is to 9
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Question 376673: 5/25=x/40
Click here to see answer by mananth(16946)

Question 377847: a recipe for rice pudding uses 1/2 cup of rice and serves 6 people. Write the cups of rice per person as a unit rate. How many cups of rice do you need to serve 75 people?
Click here to see answer by josmiceli(19441)

Question 378429: If it takes five workers six hours to paint an office, how long will it take eight workers to paint the office, assuming all the workers work at the same rate?
Click here to see answer by Edwin McCravy(20055)

Question 378642: A recipe for rice pudding uses 1/2 cup of rice and serves 6 people. How many cups of rice do you need to serve 75 people?
Click here to see answer by stanbon(75887)

Question 378724: http://my.hrw.com/math06_07/student/bookjpegs/msm2_ca/msm2_ca_08_0250.jpg
how tall is the tree?
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Question 378978: how many gallons of lemonade will it take to serve 25000 people

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Question 379259: Suppose you invested $1200 for four years. You earned $312 in simple interest. What is the interest rate?
Thank you for your time!
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Question 379357: what is the average speed in km/h if a car covers 11km in 14 minutes
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Question 379690: Change the fraction
w − 3/w + 5
into an equivalent fraction with the denominator w^2 + w � 20.
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Question 380179: Rise and run. If the rise is 3/2 and the run is 5, then what is the ratio of the rise to the run?
Click here to see answer by mananth(16946)

Question 380250: the ratio of length to width of a rectangle is 5 to 2 . what are the dimensions of the rectangle if its perimeter is 98cm . please help me solve step by step , thank you
Click here to see answer by rapaljer(4671)

Question 380381: what number is 76% of 25

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Question 380381: what number is 76% of 25

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Question 380400: How to write a proportion for each situation. then solve.
Ex: Jaime paid $1.29 for three ponytail holders. At the rate, what would eight ponytail holders cost her??
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Question 380438: the scale on a map approximately 5/8 inches to 20 miles. if the distance from city A and city B measures 8.5 inches on the map, how far are the two cities
Click here to see answer by mananth(16946)

Question 380536: How do i estimate the solution of each proportion? examples: m/25=16/98 7/3=52/n 30/5.9=k/10 2.8/j=1.3/2.71 y/12=2.89/4.23 5/8=b/63 9/4=35/d c/7=28/50
Click here to see answer by Fombitz(32388)

Question 380571: what is 76% of 25
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Question 381270: 6+|3-5(2)|
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Question 381851: what is 3/5 = 9/x?
Click here to see answer by nerdybill(7384)

Question 381943: 24/h=16/4
Click here to see answer by mananth(16946)

Question 381951: w/6=7/2
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Question 383384: If Jahan can eat 24 hot dogs in 4 minutes, how many hot dogs can he eat in 320 seconds?
Click here to see answer by josmiceli(19441)

Question 383856: The number of patients Dr. Wong can see is directly proportional to the time it takes her to see them. If she can see 9 patients in 3 hours, how long would it take her to see 45 patients?

Click here to see answer by rfer(16322)

Question 383922: How do you find how to solve a right-triangle.if the numbers are 21 ,35,5,4? the answers is 26.25.
Click here to see answer by Alan3354(69443)

Question 384173: The ratio of the measures of three sides of a triangle are 1/2: 1/3: 1/5, and its perimeter is 6.2 centimeters. Find the measure of each side of the triangle.
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Question 384303: "what is the unit rate of 300 in 6 hours"

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Question 384300: 45 min/2miles =??hrs/1mile
I am trying to help my son. the book says the answer is 3/8...help...lol
Click here to see answer by ankor@dixie-net.com(22740)

Question 384300: 45 min/2miles =??hrs/1mile
I am trying to help my son. the book says the answer is 3/8...help...lol
Click here to see answer by stanbon(75887)

Question 384300: 45 min/2miles =??hrs/1mile
I am trying to help my son. the book says the answer is 3/8...help...lol
Click here to see answer by rfer(16322)

Question 385272: The cost of a pizza varies directly with the square of its radius. If the cost of the pizza is $8.00 when the radius is 8 inches, find the cost when the radius increases to 10 inches.
Click here to see answer by mananth(16946)

Question 385402: Solve for x: 2x/7 = 4
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Question 385426: the ratio of male to female students at a certian university is 5 to 4. if there is a total of 10, 350 students, find the number of male students and the number of female students.
Click here to see answer by edjones(8007)

Question 385427: one positive number is 5 larger than another number. the sum of their squares is 53. find the numbers.
Click here to see answer by Jk22(389)

Question 385653: how do you solve 6/r=2/(r-6)
Click here to see answer by rfer(16322)

Question 386225: If a snowman's hand is 5", how tall is the snowman? Please explain and show your work, so I will know how to figure it out. Thanks!!
Click here to see answer by solver91311(24713)

Question 386263: A flagpole casts a shadow of 36 feet. If a man 6 feet tall casts a shadow
8 feet long at the same time and location, how tall is the flagpole?
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Question 386264: Julie worked 32 hours last week and was paid $256. At the same rate,
what will Julie be paid if she works 40 hours this week?
Click here to see answer by stanbon(75887)

Question 386265: At a certain high school, the ratio of boys to girls is 5 to 4. If there are
2400 boys, how many girls are there?
Click here to see answer by mananth(16946)

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