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 Question 185487: Solve Problems Using Linear Systems 9. Milk and cream contain different percents of butterflat. How much 3% milk needs to be mixed with how much 15% cream to give 20 L of 6% cream? (answers are: 15 L of 3% milk, 5 L of 15% cream, but i dont know how to solve it?) Click here to see answer by stanbon(57347)

 Question 185494: Solve Problems Using Linear Systems 12. For a school band trip, Marcia decides to order T-shirts for all of the participants. It will cost \$4 per shirt for the medium size, and \$5 per shirt for the large size. Marcia orders a total of 70 T-shirts and spends \$320. How many are medium shirts? (the answer is: 30 medium T-shirts, but i dont know how to solve it?) Click here to see answer by Alan3354(30993)

 Question 185491: Solve Problems Using Linear Systems 11. To join Karate Klub, David must pay a monthly fee of \$25 and an initial fee of \$200. If he chooses Kool Karate, he must pay an initial fee of only \$100 but \$35/month. a) After how many months is the cost the same at either karate clubs? (the asnwer is 10 months, but i dont know how to do it?) b) If David plans to try karate for 6 months, which club should he join? (the asnwer is Kool Karate, but i dont know how to do it?) c) If David decideds to do karate for a year, which club should he join? (the asnwer is Karate Klub, but i dont know how to do it?) Click here to see answer by Earlsdon(6287)

 Question 185489: Solve Problems Using Linear Systems 10. Amy needs to make 10 L of 42% sulphuric acid solution. In the supply room, she finds bottles of 30% sulphuric acid solution and 60% sulphuric acid solution. What volume of each solution should she mix in order to make the 42% solution? (Answers are: 6 L of 30% sulphuric acid solution, 4 L of 60% sulphuric acid solution, but i dont know how to solve it?) Click here to see answer by Earlsdon(6287)

 Question 185542: 1/2x^2 - x -2 =0 answer: x= 1+- sqrt(5) im not good with fractons trying to figure out how my book got this answer Click here to see answer by jim_thompson5910(28595)

 Question 185580: a fairgrounds most popular attraction is a roller-coaster ride known as the terror run. one of the stretches of track is called the missile path and is in the form of a parabolic curve,starting at point A on the curve and ending at B. B is 180m horizontally from A and the highest point of the curve is 100m above A and B. (a) what is the quadratic expression to describe the missile path ? Click here to see answer by ankor@dixie-net.com(15652)

 Question 185496: 12. For a school band trip, Marcia decides to order T-shirts for all of the participants. It will cost \$4 per shirt for the medium size, and \$5 per shirt for the large size. Marcia orders a total of 70 T-shirts and spends \$320. How many are medium shirts? (the answer is: 30 medium T-shirts, but i dont know how to solve it?) no i dont know how to do it via. Click here to see answer by ankor@dixie-net.com(15652)

 Question 185592: Two positive real numbers have a sum of 7 and a product of 11. Find the numbers. I don't know how to start this problem. Also. 2x^2 + 6x + 3 = 0 how would you do this using completing the square? I did it. but ended up with a weird answer like -3/2 +or- the square root of 3 over 2. Click here to see answer by Earlsdon(6287)

 Question 185634: Give exact and approximate solutions to three decimal places (x+9)^2=16 Click here to see answer by jim_thompson5910(28595)

 Question 185639: Solve Problems Using Linear Systems 8. Hakim invested \$15 000. He put part of it in a term deposit that paid 4 percent per annum, and the remainder in a treasury bill that paid 5 percent per annum. After one year, the total interest was \$690. How much did Hakim invest each rate? can you please help me ..i dont understand it thank u Click here to see answer by Earlsdon(6287)

 Question 185642: Solve Problems Using Linear Systems 10. White vinegar is a solution of acetic acid in water. There are two strengths of white vinegar-a 5% solution and a 10% solution. How many mililitres of each solution must be mixed to make 50 mL of a 9% vinegar solution? Can you please help me with these problem? Thank you very much!!! Click here to see answer by checkley77(12569)

 Question 185645: Solve Problems Using Linear Systems 13. A plane took 4h to fly 2200 km from Saskatoon to Toronto with a tail wind. The return trip, with a head wind, took 5h. Find the speed of the plane in still air and the wind speed. Can you please help me with this word problem? thanksss Click here to see answer by checkley77(12569)

 Question 185646: Solve Problems Using Linear Systems 14. The perimeter of a pool table is about 7.8 m. Four times the length equals nine times the width. What are the dimensions of the table, in metres? Can you please help me to solve this problem? thank you very much!!!! Click here to see answer by checkley77(12569)

 Question 185643: Solve Problems Using Linear Systems 11. What volume, in mililitres, of a 60% hydrochloric acid solution must be added to 100 mL of a 30% hydrochloric acid solution to make a 36% hydrochloric acid solution? Can you help me please? Thanks Click here to see answer by Earlsdon(6287)
 Question 185643: Solve Problems Using Linear Systems 11. What volume, in mililitres, of a 60% hydrochloric acid solution must be added to 100 mL of a 30% hydrochloric acid solution to make a 36% hydrochloric acid solution? Can you help me please? Thanks Click here to see answer by checkley77(12569)

 Question 185636: i really dont get this one can u plz help me Thanks Solve Problems Using Linear Systems 7.It took a patrol boat 5h to travel 60 km up a river against the current and 3h for the retunr trip with the current. Find the speed of the boat in still water and the speed of the current. Click here to see answer by checkley77(12569)

 Question 185616: Solve Problems Using Linear Systems 16. A class trip is being planned. For one option, each student will pay \$630. This includes two meals a day and accommodation for the 9-day trip. The other option offers three meals a day and accommodationfor the 9 days. This second option costs \$720. What is the cost per meal? What is th cost per day for accommodation? (The answer is \$10 per meal, \$50 per day for accommodation, but i dont know how to solve it?) Click here to see answer by checkley77(12569)

 Question 185614: Solve Problems Using Linear Systems 15. Some students at L.C.V.I. held a bake sale recently to raise money for a field trip. They charged \$7 for fruit pies and \$10 for meat pies. They sold a total of 52 pies and earned \$424. How many of each type of pie did they sell? (The answer is: 32 fruit pies, 20 meat pies, but i dont know how to solve it?) Click here to see answer by checkley77(12569)

 Question 185610: Solve Problems Using Linear Systems 14. A metal alloy is 25% copper. Another metal alloy is 50% copper. How much of each should be used to make 500 g of an alloy that is 45% copper? (The answer is: 100 g of metal alloy that is 25% copper, 400 g of metal alloy that is 50% copper, but i dont know how to solve it?) Click here to see answer by checkley77(12569)

 Question 185602: Solve Problems Using Linear Systems 6. Consider the linear systems 3x-y=8 4x-y=-15 a) Which method would you choose to solve the linear systems and why? Solve using the method you chose. b) Now solve using one of the other methods available to you. (The answer is: a)(-23, -77) and b) (-23,-77), but i dont know how to solve it?) Click here to see answer by checkley77(12569)

 Question 185664: Solve Problems Using Linear Systems 2. James looks in his TV cabinet and finds some old Beta and VHS tapes. He has 17 tapes in all. He finds that he has three more Beta tapes than VHS tapes. How much many of each type does he have? (The answer is: 10 Beta tapes and 7 VHS tapes, but i dont know how solve this problem?) Thank you very much!!! Click here to see answer by scott8148(6628)

 Question 185678: Solve Problems Using Linear Systems 17. Ian flew his airplane at best cruise speed for 2 h, then at economy cruise speed for 3 h, covering a total of 850 km. On the following day, he flew a tbest cruise speed for 3 h and at economy cruise speed for 2 h, covering a total of 900 km. Find the best cruise speed and the economy cruise speed for Ian's airplane. (The answer is: best cruise speed 200 km/h, economy cruise speed 150 km/h, but i dont know how to solve this problem?) Thank you very much!!! Click here to see answer by scott8148(6628)

 Question 185695: Solving Problems Using Linear Systems 1. Leanne works at a greenhouse. She needs to plant a total of 32 bulbs. Two types of bulbs are available. She is asked to plant three times as many crocus bulbs as tulip bulbs. How many of each should she plant? (The answer is: 24 crocus bulbs and 8 tulip bulbs, but i dont know how to solve it?) Can you pleaseeeeeeeeeeeeee help me with this problem thank you very much!!!! Click here to see answer by nerdybill(6958)
 Question 185695: Solving Problems Using Linear Systems 1. Leanne works at a greenhouse. She needs to plant a total of 32 bulbs. Two types of bulbs are available. She is asked to plant three times as many crocus bulbs as tulip bulbs. How many of each should she plant? (The answer is: 24 crocus bulbs and 8 tulip bulbs, but i dont know how to solve it?) Can you pleaseeeeeeeeeeeeee help me with this problem thank you very much!!!! Click here to see answer by stanbon(57347)

 Question 185750: what are these in standard form: (-5, 0) and (1, 0) My teacher went over it in class but i'm struggling with it please help me. Click here to see answer by Alan3354(30993)

 Question 185852: The hypotenuse of a right triangle measures 20cm. The sum of the lengths of the other 2 sides is 28cm. Find the lengths of these two sides. x(squared) + (28 - x)(squared) = 20(squared) Let x be the length of one side. Therefore the length of the other side is 28 – x. Click here to see answer by solver91311(16885)
 Question 185852: The hypotenuse of a right triangle measures 20cm. The sum of the lengths of the other 2 sides is 28cm. Find the lengths of these two sides. x(squared) + (28 - x)(squared) = 20(squared) Let x be the length of one side. Therefore the length of the other side is 28 – x. Click here to see answer by edjones(7569)

 Question 185846: Connect English With Mathematics 1. Translate each sentence into a an equation. Tell how you are asssigning the two variables in each. b) Maggie's age increased by three is twice Janice's age, decreased by nine. I need help here pleaseeeeeeeeeeeeeeeeeeeeeee................ Click here to see answer by edjones(7569)

 Question 185844: Method of Substitution 7. There are 35 people in a room. There are seven more males than females in the room. How many males are there? How many females? can you please help me to solve this problem thanks? Click here to see answer by edjones(7569)

 Question 185840: Solve Problem Using Linear Systems 13. One type of granola has 30% nuts, by mass. A second type of granola has 15% nuts. What mass of each type needs to be mixed to make 600 g of granola that will have 21% nuts? Can you please help me with this question thank you very much!!! Click here to see answer by edjones(7569)

 Question 185845: Connect English With Mathematics 1. Translate each sentence into a an equation. Tell how you are asssigning the two variables in each. a) John has nickels and dimes that total \$2.50 in his pocket. I need help pleaseeeeeeeeee... Click here to see answer by solver91311(16885)

 Question 185843: Method of Substitution 6. Josie wants to buy Internet access. One service provider charges a flat rate of \$34.95/month. A second charges \$25/month plus 33cent/h. For what number of hours per month should Josie choose the flat rate? can you please help me to solve this question? thank you Click here to see answer by checkley77(12569)

 Question 185635: Solve Problems Using Linear Systems 6.Kareem took 5h to drive 470 km from Sudbury to Brantford.For part of the trip, he drove at 100 km\h. For the rest of the trip, he drove at 90 km\h. How far did he drive at each speed? Can you please help me solve this problem.i dont understand. thank you Click here to see answer by ankor@dixie-net.com(15652)

 Question 185692: Solving Problems Using Linear Systems 8. With a tailwind, a plane flew the 3000 km from Calgary to Montreal in 5 h. The return flight, against the wind, took 6 h. Find the wind speed and the speed of the plane. (The answer is: wind speed 50 km/h, speed of plane 550 km/h, but i dont know how to solve this question?) Thankssss!!! Click here to see answer by ankor@dixie-net.com(15652)

 Question 185841: Solving Problem Using Linear System 18. A train leaves Toronto for Montreal at the same time as another train leaves Montreal for Toronto. The cities are 500 km apart. The trains pass each other 2 h later. The train from Montreal is travelling 50 km/h faster than the one from Toronto do the trains pass each other? Can you please help me with this question? Thanks a lot!!! Click here to see answer by ankor@dixie-net.com(15652)

 Question 185928: An interesting method for solving quadratic equations came from India. The steps are (a) Move the constant term to the right side of the equation. (b) Multiply each term in the equation by four times the coefficient of the X square term. (c) Square the coefficient of the original X term and add it to both sides of the equation. (d) Take the square root of both sides. (e) Set the left side of the equation equal to the positive square root of the number on the right side and solve for X. (f) Set the left side of the equation to the negative square root of the number on the right side of the equation and solve for X. x2 - 2x – 13 = 0 Click here to see answer by solver91311(16885)

 Question 186014: A rectangular skating rink measures 40m by 20m. It is to be doubled in area by extending each side by the same amount. Determine how much each side should be extended, to the nearest tenth of a meter. Let x be the amount that each side is extended in meters. (40 + 2x)(20 + 2x) = 40*20*2 Click here to see answer by ankor@dixie-net.com(15652)

 Question 186118: I been having trouble solving the world problems in this chapter. the examples giving in the chapter don't really help. can someone please help me! Find the lenght and width. assume the shapes are rectangular. #3. the width of a dock is 4m less than the lenght. The area is 12m^2. Click here to see answer by checkley77(12569)