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Question 571445: A man is twice as old as his son 20 years ago of the man was 12 times the age of the son. Find their present ages. (Ans. 44 Years, 22 Years)
Click here to see answer by josmiceli(6774)

Question 571229: if it takes 4 hours for a group of people to paint a house and 6 hours for another group of people to paint another house, How long will it take for both groups of people to paint a house together?
Click here to see answer by nerdybill(5403)

Question 571204: Rebekah's recipe for 4 1/2 dozen cookies calls for 6 cups of sugar. How many cups of sugar are needed to make 8 dozen cookies?

9 2/3 cups

12 2/3 cups

11 2/3 cups

10 2/3 cups

Click here to see answer by mrjunecarlo1095@ymail.com(7)

Question 571031: Find two numbers whose sum is 54 and whose product is 665.
Click here to see answer by nyc_function(2626)

Question 570898: Hope went shopping and found a pair of jeans that had been marked down four times. The purchase price was a combination of the mark downs. The jeans started at $49.99. The first mark down was 20%, that price was marked down 30%, the third mark down was 10%, and the final mark down was an additional 20%. How much were the jeans?
Click here to see answer by josmiceli(6774)

Question 570899: Shalisha buys a 32-pound pumpkin and pays $12.48 for it. How much does the pumpkin cost per pound?
Click here to see answer by nerdybill(5403)

Question 570856: Gabe, a Nuclear Physicist, needs 90 liters of a 50% acid solution. He currently has a 30% solution and a 60% solution. How many liters of each does he need to make the needed 90 liters of 50% acid solution?
Click here to see answer by josmiceli(6774)

Question 570387: I am not sure if this under the right category but here is the question..
The Mars Rover Spirit landed on Jan 3, 2004. Just over one year later on Jan 14 2005 the huygens probe landed on Titan. At the closest approach the distance from Earth to Saturn is 29 million miles more than 21 times the distance from Earth to mars. If the distance to Saturn is 743 million miles, what is the distance to mars?
Click here to see answer by Edwin McCravy(6931)

Question 570236: if the length of one side of a square is doubled and the length of an adjacent side is decreased by 3, the area of the resulting rectangle exceeds the area of the original square by 16. The length of a side of the original square is?
Click here to see answer by ankor@dixie-net.com(12684)

Question 570234: The sum of the digits of a two-digit number is 6. When the digits are reversed, the new number is 36 more than the original number. Find the number.

Click here to see answer by Maths68(1140)

Question 570188: eleven more than twice the number is 19, find the number.
Click here to see answer by JBarnum(1826)

Question 570172: Find the measure of two complementary angles if one angle is 9 deg more than two times the other angle.
Click here to see answer by JBarnum(1826)

Question 569568: All of M. Newsome's books were published in volumes exactly 5 in. wide and 8 in. high. How many of his volumes could be put in a sqauare that is 45 in. wide and 48in. high?
Click here to see answer by KMST(578)

Question 570006: using 0,1,2,3,5,6 only once each, find the starting and ending time of a test if it takes 3 hours and 45 minutes
Click here to see answer by AnlytcPhil(1116)

Question 570011: 1. Freedom or Alligators
Once upon a time, a prison warden was responsible for 22 prisoners on Death Row. These prisoners were students who had done terrible things: some illegally downloaded movies and music, some texted during classes, some were addicted to Facebook, and some watched Glee.
One day, the warden offers the prisoners one chance at freedom. After a brief discussion period in which they could plan their strategy, each of the prisoners will be placed in solitary confinement (in completely soundproof cells) with absolutely no way to communicate with one another. The warden will arbitrarily take one prisoner at a time to another room containing two light switches side by side. The switches are not connected to anything, but the warden tells the prisoners that at the beginning of the entire process both switches will begin in the “Off” or “Down” position. The rules are that each time one of the prisoners enters the room he or she must flip exactly one of the switches.
The warden tells the prisoners that if one of them ever correctly announces that all 22 prisoners have been in the room that they will all be released. However, if any of the prisoners ever incorrectly claims that all 22 have been in the room, then all 22 will be fed to the warden’s pet alligators.
The warden makes it clear to that prisoners may be returned to the room any number of times, but there is no way for the prisoners to communicate with one another other than by way of the two light switches. The room with the switches will be thoroughly cleaned after each prisoner leaves.
The prisoners are given some time to come up with a plan before they are to be placed in solitary confinement.
How do they ensure their freedom?

Click here to see answer by solver91311(12118)

Question 569729: what 2 numbers add up to -126 but multiply to get 9720
Click here to see answer by JBarnum(1826)

Question 569729: what 2 numbers add up to -126 but multiply to get 9720
Click here to see answer by Alan3354(21550)

Question 569580: Emma is making a model of a Mardi Gras float. She is making it from a shoebox that measures 10 in. wide x 6in. long x 5in. high. She will cover the bottom and all four sides with velvet. How many square in. of velvet will she need?
Click here to see answer by JBarnum(1826)

Question 569569: James derew a rectangle that was 10in. wide and 14 in. long. Inside the rectangle he drew a triangle. What is the area of the largest triangle he could draw inside the rectangle?
Click here to see answer by JBarnum(1826)

Question 569466: A rectangular tank with a base 4 feet by 5 feet and a height of 4 feet is full of water. The water weighs 62.4 pounds per cubic foot. How much work is done in pumping water out over the top edge in order to empty (a) half of the tank? (b) all of the tank?
a)2496 ft-lbs
b)9984 ft-lbs
Explain why the answer in part b is not exactly twice the answer in part a.
I figured out the amount of work (answers above), but I do not know how to explain the answers.
Click here to see answer by ankor@dixie-net.com(12684)

Question 569341: 1.)the sum of 2 numbers is 48 and their difference is 24. what are the numbers
2.)a group of students visted an art muesuem . 2 adults and 5 students in one van paid $77. 2 adults and 7 students in the second van paid $95. find the price for 1 adult and 1 student.
3.)the addmission fee at a small fair is $1.50 and $4.00 for adults. on a certain day 2200 people entere the fair and $5050 is collected. how namy children and how namy adults attended
4.)a landscaping company placed 2 orders with a nursery. the first order was for 13 bushes and 4 trees, and tottaled $487. the second order was for 6 bushes and 2 trees and totalled $232. the bills do not list the per item pirce. what were the cost of 1 bush and 1 tree
on all of them you have to define the variables,write yout sytems of equations, and show your work
Click here to see answer by solver91311(12118)

Question 568975: 3. A wire 100 inches long is bent into a rectangle. If the width is
x,
3. How is length represented? What is the function for area?
4. What must be the dimensions of the rectangle so that area is a
maximum?
5. What is the maximum area possible?
Click here to see answer by htmentor(580)

Question 568749: Deon has 12 milliliters of a 5% solution. He also has a solution that has a concentration of 30%. How many milliliters of the 30% solution does Deon need to add to the 5% solution to obtain a 20% solution?
Click here to see answer by mananth(10539)

Question 568617: Seven less than twice a number is greater than the number increased by 3.
Click here to see answer by nyc_function(2626)

Question 568392: A says to B, If you give me $12, we will have and equal amount of money." Monte respons,"that may be true but if you give me $6, I will have twice as much as you.How much money does A and B each have?
Click here to see answer by htmentor(580)

Question 568285: When Bert and Ernie merged their automobile dealerships, Bert had 10 more cars than Ernie. While 36% of Ernie's stock consisted of new cars, only 25% of Bert's stock consisted of new cars. If they had 33 new cars on the lot after the merger, then how many cars did each one have before the merger?
Click here to see answer by josmiceli(6774)

Question 568206: A 1,500 kg car accelerates from 44 km/h to 80 km/h in 10 s. What was the net force exerted on the car?
I know that F=ma but I am confused about what to do because it asks for the net force do I add 44 and 88 or subtract the terms?
Click here to see answer by richard1234(4789)

Question 568113: How do you solve for t in this equation:
(t/E)+1=t/V
Click here to see answer by Alan3354(21550)

Question 568100: How much 15% HCl must be mixed with 8% HCl to produce 60mL of 9% solution?
Click here to see answer by stanbon(48510)

Question 568034: what is the integer x which is satisfies 10^x < (1/2)(3/4)(5/6)(7/8)....(99/100) < 10^(x+1)?
Click here to see answer by stanbon(48510)

Question 567917: A worker was paid $4.50 per hour for a 40-hour week. The worker was paid an additional $1.50 per hour for each hour over 40 hours per week.
How much did the worker earn in 3 weeks if he worked 43 hours the first week, 42 hours the second week, and 45 hours the third week?
Click here to see answer by josmiceli(6774)

Question 567907: The gravitational attraction A between two masses varies inversely as the square of the distance between them. If the force of attraction is 2.25 lbs when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?
My answer = 3 lbs.
Thank you.
Click here to see answer by Alan3354(21550)

Question 567908: It is necessary to have a 40% solution in the radiator of a certain car. The radiator now has 50 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
My answer = 20 liters
Thanks!
Click here to see answer by nerdybill(5403)

Question 567858: You are offered two different jobs selling dental supplies. One has an annual salary of $20,000 plus an end of year bonus of 1% of your total sales. The other has a salary of $15,000 and a year -end bonus of 2% of your sales. How much would you have to sell to have the jobs pay the exact same amount?
Equations: x represents:
y represents:
pay job 1 y =
pay job 2 y =
Solve the system:
Solution: If you would sell $_______________________ of equipment, both jobs would pay you $_____________________.
Analysis: If you were to sell $300,000 worth of equipment, which job would pay better? _______________. If you were to sell $700,000 worth of equipment, which job would pay better?___________________. If you sell $__________________ or more Job 2 would pay better.

Click here to see answer by mananth(10539)

Question 567707: A merchant mixed 10 lb of a cinnamon tea with 5 lb of spice tea. The 15-pound mixture cost $40. A second mixture included 12 lb of the cinnamon tea and 8 lb of spice tea. The 20 lb mixture cost $54. Find the cost per pound of the cinnamon tea and the spice tea.
Click here to see answer by lwsshak3(2915)

Question 567732: I don't know what I did wrong. Hope you can help.
In 2005, the number of federal hazardous waste sites in Cali was 3 less than twice the number of sites in Washington. How many hazardous waste sites were there in Washington if there were 21 such sites in Calif?
In Washington, there were ____ federal hazardous waste sites.
I said 39. A friend of mine also said 39. The correct answer was 12.
21 * 2= 42
42 - 3 = 39
I am not sure what I am doing wrong.

Click here to see answer by stanbon(48510)

Question 567530: In the lab, Jim has two solutions that contain alcohol and is mixing them with each other. He uses milliliters less of Solution A than Solution B. Solution A is alcohol and Solution B is alcohol. How many milliliters of Solution B does he use, if the resulting mixture has milliliters of pure alcohol?
Click here to see answer by gumbug(1)

Question 567475: Going into the final exams, which will count as two-thirds of the final grade, Mike has test scores of 86,80,84, and 90. What score does Mike need on the final in order to earn a B, whuch requires an average score of 80? What does he need to earn an A, which requires an average of 90?
Click here to see answer by lwsshak3(2915)

Question 567233: train A travels 20mph slowr than Train B. It takes Train A 30min. longer than train B to travel 200 miles.
how long does it take train A to make the 200mile trip? how long does it take train B to travel 535 miles??
Click here to see answer by lwsshak3(2915)

Question 566955: Explain how you know a triangle can have side lengths measuring 11,
15 and 21.
Click here to see answer by richard1234(4789)

Question 567191: Things did not go quite as planned. You invested $10,250.00, part of it in stock that paid 12.5% annual interest. However, the rest of the money suffered a 6.7% loss. If the total annual income from both investments was $346.00, how much was invested at each rate?
Click here to see answer by stanbon(48510)

Question 566914: John, Paul, George, and Stuart were four school friends. After one particularly hard day's night, they went to see a movie together. After the first time, they began going regularly but on different schedules. (They even went on weekends.) John went every fourth day, Paul went every fifth day, George went every seventh day, and Stuart went every ninth day. How many days was it before all four went to the movies together again?
Thanks
Click here to see answer by ankor@dixie-net.com(12684)

Question 566995: John, Paul, George, and Stuart were four school friends. After one particularly hard day's night, they went to see a movie together. After the first time, they began going regularly but on different schedules. (They even went on weekends.) John went every fourth day, Paul went every fifth day, George went every seventh day, and Stuart went every ninth day. How many days was it before all four went to the movies together again?
Click here to see answer by stanbon(48510)

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