Tutors Answer Your Questions about Quadratic Equations (FREE)
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(7384)  |
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(75887) |
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(24713)  |
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(8007)  |
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(8007) |
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(8007) |
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(8007) |
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(24713) |
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(12844) |
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(22740)  |
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(22740) |
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(22740) |
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(24713) |
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(22740) |
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(12844) |
Question 186277: Hi my name is Brandie. My teacher gave me a math problem to day and I can't get it. The problem is:
The table is for a quadratic equation-
x, y
-3, 0
-2, -7
-1, -8
0, -3
1, ?
Determine the quadratic equation using the information from the table. And solve for '?'. I don't understand how I'm suppose to do this. Can you because help me. This is the only problem I can't get.
Click here to see answer by ankor@dixie-net.com(22740) |
Question 186277: Hi my name is Brandie. My teacher gave me a math problem to day and I can't get it. The problem is:
The table is for a quadratic equation-
x, y
-3, 0
-2, -7
-1, -8
0, -3
1, ?
Determine the quadratic equation using the information from the table. And solve for '?'. I don't understand how I'm suppose to do this. Can you because help me. This is the only problem I can't get.
Click here to see answer by stanbon(75887) |
Question 186289: If there is any way you can help, please do, I am soooo lost.
Show the equation that you used to solve each problem. Be sure to say what quantity each variable represents.
1. A rectangular garden has dimensions of 15 feet by 11 feet. A gravel path of uniform width is to be built around the garden. How wide can the path be if there is enough gravel for 192 square feet?
2. A business invests $8,000 in a savings account for two years. At the beginning of the second year, an additional $2,500 is invested. At the end of the second year, the account balance is $11,445. What was the annual interest rate?
3. Steve traveled 150 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 2 hours less. Find the speed of his vehicle.
4. The Hudson River flows at a rate of 5 miles per hour. A patrol boat travels 40 miles upriver, and returns in a total time of 6 hours. What is the speed of the boat in still water?
Click here to see answer by stanbon(75887) |
Question 186313: THESE ARE FOURTH GRADE MATH QUESTIONS: PLEASE HELP ME I'M PUZZLED ON THIS
1. AT A PARTY, LOU ATE 6 FEWER APPETIZERS THAN SUSAN. CHRIS ATE 8 MORE THAN LOU. MITCHELL ATE 5 FEWER THAN CHRIS. MITCHELL ATE A TOTAL OF 5 APPETIZERS. HOW MANY DID SUSAN HAVE?
2. THE TIGERS FOOTBALL TEAM GAINED 12 YARDS ON THEIR SECOND PLAY. ON THEIR THRID PLAY, THEY LOST 24 YARDS. ON THEIR FOURTH PLAY, THEY GAINED 31 YARDS AND WERE STOPPED AT THEIR 42-YARD LINE. AT WHAT YARD LINE WERE THEY AFTER THE FIRST PLAY?
Click here to see answer by vleith(2983) |
Question 186455: write the expression 9x^2-9x+1 in the form a(x+b)+c where a, b, and c are real numbers.
Hence, state whether the function y = 9x^2-9x+1 has a maximum or minimum value.
state the value of x at which this maximum or minimum value occurs
Click here to see answer by feliz1965(151) |
Question 186633: Hi there,
It would be great if someone could help me solve the following question as I am not too strong on transformations and it would be a huge help if someone could explain the solution to the following question.
Given the equation y=2^x, predict the equation for the graph that has been reflected in the y-axis, given a vertical stretch by a factor of 5, translated 2 units right and 5 units down.
Click here to see answer by vleith(2983) |
Question 186632: Hi there,
I was finishing my Quadratics homework and had a problem that I couldn't seem to be able to graph. Could someone please help me with this question.
Sketch y=-1/4(2)^x-4+5 by first including a table describing its major features.
Click here to see answer by Alan3354(69443)  |
Question 186635: The following question is very hard and I honestly do not understand how to do it. I am supposed to do it for a homework assignment and its worth 8 marks. Could someone please help me with this? I would be really grateful.
Given y=1/5log^3(9x-36)^15-13, apply the laws of logarithms to change the form of the equation. Graph the function by first stating the basic function and then describe what transformation applied in order. Specifically describe what happens to the domain, range, asymptotes, x-intercept, and vertical stretch or compression. Confirm your result by graphing both equations using a graphing technology of your choice.
Click here to see answer by Alan3354(69443) |
Question 186812: Jessica pulled the plug in her bathtub and it started to drain at a rate of L=-5T sqared-8T+120 where L represents the number of litres of water in the bathtub and T represents the number of minutes since the plug was pulled.
How long will it take for all of the water in the tub to drain out?
How many litres of water were in the tub originally?
my name is Chantal and I know how to find the vertex and the roots but I wasn't at school to learn these word problems. Can you help me?
The vertex is(-.8, 123.2)
The roots are -5.763869458 and 4.163869458
This is not in a text book
Click here to see answer by Alan3354(69443) |
Question 186740: When an arrow is shot in the air, the height of the arrow h(t),at time t, t>or equal to 0, is determined by the equation h(t)= -4tsquared +16t+1.For which interval of time is the height of the arrow greater than or equal to 11 meters?
I figured out the vertex (2,17) and roots are in decimals-.0615528128 and 4.061552813. I believe the 4.061552813 is how long it takes to go up and down, reaching 17 meters going up, but I don't know how long for 11 meters. I missed on how to do this I was sick all week and have no one to explain it to me. Please help me. Chantal Laroche
Click here to see answer by ankor@dixie-net.com(22740) |
Question 186794: This is a story problem and i have to find two equations.
one is linear and one is quadratic.
here is the problem:
"Two very lucky twin brothers have very wealthy parents who offered them very generous allowances at the tender age of 8 years old. the boys had 2 choices. under Option 1, they could take a monthly allowance of $100 this year (year 0) and expect a $100 raise every year until they turn 18 (year 10). Under option 2 they could take a monthly allowance of $5 this year (year 0), and the amount would double every year until they turn 18 (year 10). What are the equations that would represent each option?"
Click here to see answer by Edwin McCravy(20054)  |
Question 186860: HELP PLEASE!! Determine whether the following equation have a solution or not? √2 x² - 4x – 7 √2 = 0''. This is the way I done it but I am not sure if I did the equdratic portion correctly. I get confused on having to divide the equation by 2(√2). The square root is what is confusing me.
2 solutions because the discriminate = 72 which is > 0
b² - 4ac
= (-4)² - 4(√2) (-7√2)
= 16 – 4(2) (-7)
= 72
Solution 1:
X = -b ±√b² - 4ac /2a
X = -(-4) + √72 /2(√2)
X = 4 + 8.485281374 /2.828427125
X = 4.414213562
Solution 2:
X = -b ±√b² - 4ac /2a
X = -(-4) - √72 /2(√2)
X = 4 – 8.485281374/2.828427125
X = -1.585786437
Click here to see answer by vleith(2983) |
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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, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 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23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 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