Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 184471: Solve the following application problem (show your equation and then your solution). Round answers to nearest thousandths and properly label your answer as well.
A rectangular garden is to be surrounded by a walkway of constant width. The garden's dimensions are 15ft by 25ft. The total area, garden plus walkway, is to be 650ft^2. What must be the width of the walkway?
Click here to see answer by ankor@dixie-net.com(15667)   |
Question 184528: I'm can't figure out how to create a quadratic equation out of the vertex and a point that it must pass through. All i've managed so far is some trial and error and come up with this.
y=2(x+2)²+4
From the vertex of (-2,4) and passing through (-1,8).
I have been fiddling around with it and have two ideas how to proceed.
I could change (x+2) to something else to move it along the x axis or change the first part of it to change the fatness or whichever you want to call it of the parabola. Regardless i figure there is a better way to do it other then trial and error, if it has been answered before i'm sorry I didn't see it. I'm self taught and this is the first time I really have had any problem.
-Thanks
Click here to see answer by jim_thompson5910(28598) |
Question 184533: I'm can't figure out how to create a quadratic equation out of the vertex and a point that it must pass through. All i've managed so far is some trial and error and come up with this.
y=2(x+2)²+4
From the vertex of (-2,4) and passing through (-1,8).
I have been fiddling around with it and have two ideas how to proceed.
I could change (x+2) to something else to move it along the x axis or change the first part of it to change the fatness or whichever you want to call it of the parabola. Regardless i figure there is a better way to do it other then trial and error, if it has been answered before i'm sorry I didn't see it. I'm self taught and this is the first time I really have had any problem.
-Thanks
Click here to see answer by jim_thompson5910(28598) |
Question 184530: I'm can't figure out how to create a quadratic equation out of the vertex and a point that it must pass through. All i've managed so far is some trial and error and come up with this.
y=2(x+2)²+4
From the vertex of (-2,4) and passing through (-1,8).
I have been fiddling around with it and have two ideas how to proceed.
I could change (x+2) to something else to move it along the x axis or change the first part of it to change the fatness or whichever you want to call it of the parabola. Regardless i figure there is a better way to do it other then trial and error, if it has been answered before i'm sorry I didn't see it. I'm self taught and this is the first time I really have had any problem.
-Thanks
Click here to see answer by jim_thompson5910(28598) |
Question 184529: I'm can't figure out how to create a quadratic equation out of the vertex and a point that it must pass through. All i've managed so far is some trial and error and come up with this.
y=2(x+2)²+4
From the vertex of (-2,4) and passing through (-1,8).
I have been fiddling around with it and have two ideas how to proceed.
I could change (x+2) to something else to move it along the x axis or change the first part of it to change the fatness or whichever you want to call it of the parabola. Regardless i figure there is a better way to do it other then trial and error, if it has been answered before i'm sorry I didn't see it. I'm self taught and this is the first time I really have had any problem.
-Thanks
Click here to see answer by jim_thompson5910(28598) |
Question 184550: I'm can't figure out how to create a quadratic equation out of the vertex and a point that it must pass through. All i've managed so far is some trial and error and come up with this.
y=2(x+2)²+4
From the vertex of (-2,4) and passing through (-1,8).
I have been fiddling around with it and have two ideas how to proceed.
I could change (x+2) to something else to move it along the x axis or change the first part of it to change the fatness or whichever you want to call it of the parabola. Regardless i figure there is a better way to do it other then trial and error, if it has been answered before i'm sorry I didn't see it. I'm self taught and this is the first time I really have had any problem.
-Thanks
Click here to see answer by checkley77(12569) |
Question 184560: I'm can't figure out how to create a quadratic equation out of the vertex and a point that it must pass through. All i've managed so far is some trial and error and come up with this.
y=2(x+2)²+4
From the vertex of (-2,4) and passing through (-1,8).
I have been fiddling around with it and have two ideas how to proceed.
I could change (x+2) to something else to move it along the x axis or change the first part of it to change the fatness or whichever you want to call it of the parabola. Regardless i figure there is a better way to do it other then trial and error, if it has been answered before i'm sorry I didn't see it. I'm self taught and this is the first time I really have had any problem.
-Thanks
Click here to see answer by solver91311(16897)  |
Question 184593: I'm can't figure out how to create a quadratic equation out of the vertex and a point that it must pass through. All i've managed so far is some trial and error and come up with this.
y=2(x+2)²+4
From the vertex of (-2,4) and passing through (-1,8).
I have been fiddling around with it and have two ideas how to proceed.
I could change (x+2) to something else to move it along the x axis or change the first part of it to change the fatness or whichever you want to call it of the parabola. Regardless i figure there is a better way to do it other then trial and error, if it has been answered before i'm sorry I didn't see it. I'm self taught and this is the first time I really have had any problem.
-Thanks
Click here to see answer by scott8148(6628)  |
Question 184612: Linear System Extension Thinking & Inquiry Questions
8. A triangle is formed by the intersection of the lines 2x+3y=14, 4x-5y=-16, and the x-axis. Find the area of the triangle
Could you help me please with this question because i am really confused. Thank you very much!!!
Click here to see answer by solver91311(16897) |
Question 184788: Connect English with Mathematics
1. Translate each sentence into an equation. Tell how you are assigning the two variables in each.
c) Twice a number, decreased by nine, is half the same number, increased by six.
Thanks.
Click here to see answer by checkley77(12569) |
Question 184824: Any help with these three would be appreciated. I keep thinking I've done them correctly but was actually wrong and I've gone around with them so much I think I've completely forgotten what I'm doing!
1. 3x2 + 11x – 20 = 0 Solve by factoring
2. x2 + 3x - 4 = 0 Solve by completing the squares
3. 3x2 – x – 1 = 0 Solve by graphing (preferably using Excel)
Click here to see answer by jim_thompson5910(28598) |
Question 184816: Solve Problems Using Linear Systems
17. Fran and Winston have a combined income of $80 000. One quarter of Winston's income is the same as one-sixth of Fran's income. How much does each person earn?
Thankssssssssss
Click here to see answer by scott8148(6628) |
Question 184813: Solve Problems Using Linear Systems
15. A motor boat took 5h to travel a distance of 60 km up a river, against the current. The return trip took 3h. Find the average speed of the boat in still water and the speed of the current.
Thank you sooooooo much!!!!
Click here to see answer by scott8148(6628) |
Question 184809: Solve Problems Using Linear Systems
14. Mengxi has $10 000 to invest. She invests part in a term deposit paying 5%/year, and the remainder in Canada Savings Bonds paying 3.5%/year. At the end of the year, she has earned simple interest of $413. How much did she invest at each rate?
Thank you very much>>
Click here to see answer by badbadjoe(1) |
Question 184916: a ball is thrown vertically upward from a height of 6ft. with an initial velocity of 64ft/s, its height h after t seconds is given by h = -16t^2 + 64t + 6. How long does it take the ball to reach a height of 38 ft. on the way up?
Click here to see answer by stanbon(57424) |
Question 184814: Solve Problems Using Linear Systems
16. One type of fertilizer has 30% nitrogen and a second type has 15% nitrogen. If a farmer needs 600kg of fertilizer that is 20% nitrogen, how much of each type should the farmer mix together?
Thank you very much.
Click here to see answer by checkley77(12569) |
Question 185254: Solve (x-9)(x+2)>0
The pypotenuse of a right triangle is 24 ft long. The length of one leg is 18 ft more than the other. Find the length of the legs. The length of the shorter leg is approximately ___________ft.
x^2+21<10x
f(x)=x^2-3x+1
The x intercept (s) is (are)_______
The y intercept (s) is (are)_______
Find the vertex, the line of symmetry, the maximum or minimum value of the quadratic function and graph the function: f(x)= -x^2+12x+2
Graph the function, label the vertex and draw the axis of symmetry:
f(x)=1/4(x-5)^2
Click here to see answer by feliz1965(151) |
Question 185475: Solving Problems Using Linear Systems
3. The girls' soccer team held a fundraising car wash. They charged $5 for each car and $8 for each van. They washed 44 cars and vans and collected $262. How many of ach type of vehicle did they wash?
(answers are: 30 cars and 14 vans, but i dont know how to solve it?)
Click here to see answer by stanbon(57424) |
Question 185477: Solving Problems Using Linear Systems
4. Rehman invests his summer earnings of $3050. He invests part of the money at 8%/year, and the rest at 7.5%/year. After 1 year, these investments earn $242 in simple interest. How much did he invest at each rate?
(answers are: $2650 at 8%/year and $400 at 7.5%/year, but i dont know how to solve it?)
Click here to see answer by stanbon(57424) |
Question 185485: Solve Problems Using Linear Systems
7. Tyler rows 10 km downstream in 2 h. On the return trip, it takes hom 4 h to travel 8 km. Determine his average rowing speed and the speed of the current.
(answrs are: average rowing speed 3.5 km/h, speed of current 1.5 km/h, but i dont know how to solve it?)
Click here to see answer by stanbon(57424) |
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