Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 124322: Write the equation y=-1/3x^2+6x+2 in transformational form . State the vertex :)
Click here to see answer by stanbon(57962)

Question 124223: The height h in feet of an object after t seconds is given by the function
h = –16t^2 + 30t + 3. How long will it take the object to hit the ground? Round your answer to the nearest thousandth.
Click here to see answer by ankor@dixie-net.com(15746)

Question 124354: solve the equation by completing the square. . my answer was . am i correct?
Click here to see answer by Edwin McCravy(8999)

Question 124353: solve the equation by completing the square. t^2-12t+20=0. how do i solve it?
Click here to see answer by jim_thompson5910(28708)

Question 124453: x2+y4=3(z+h)h
how many variables does the equation contain?
Click here to see answer by rapaljer(4667)

Question 124470: The members of a flying club plan to share equally the cost of $200000 airplane. The members want to find five more people to join the club so that the cost per person will decrease by $2000. How many members are curently in the club?
Click here to see answer by checkley71(8403)

Question 124469: Suppose Charle O'Brian hits a baseball straight upward at 150 ft/sec from a height of 5 ft.
Use the formula to determine how long it takes the ball to return to the earth.

Click here to see answer by bucky(2189)

Question 124352: solve the equation by completing the square. my equation r^2-6r=0. how do i solve it?
Click here to see answer by checkley71(8403)

Question 124351: solve the equation by completing the square. x^2+8x-13=0. my answer was (-4)+(rad)29 (with a line under the +). am i correct?
Click here to see answer by ankor@dixie-net.com(15746)

Question 124344: directions: use quadratic equation x=-b+(rad)(b^2-4ac)/2a to find theroots of the equation x^2-3x+2=0.(the plus sign by the b has a line under it). i can have one of four answers. A)2 B)2,1 C)-1,-2 D)1,1 1/2. which one is correct?
Click here to see answer by ankor@dixie-net.com(15746)

Question 124667: An art dealer sold two artworks for $1520 thereby making a profit of 25% on the first work and 10% on the other, whereas if he had approached any exhibition he would bave sold them together for $1535 with a profit of 10% on the first and 25% on the other artwork. Find the actual cost of each artwork.
Click here to see answer by ankor@dixie-net.com(15746)

Question 124744: A professor started a project with a group of students, 60% of whom were boys. Due to sme unavoidable reasons, six girls could not turn up, so the professorhad to make some changes in the grou. He admitted six boys. In doing so, the percentage of boys in the project increased to 75%. Find the number of boys and girls involvedin the project initially.
Click here to see answer by ankor@dixie-net.com(15746)

Question 124882: What three techniques can be used to solve a quadratic equation? Demonstrate these techniques on the equation "12x2 - 10x - 42 = 0."
Click here to see answer by stanbon(57962)

Question 124923: Write the equation of the line with slope and y-intercept (0, 3).
Click here to see answer by stanbon(57962)

Question 124917:
Given f(x) = –x3 – 3x2 + 3x + 7, find f(–1), f(0), and f(2)
Click here to see answer by checkley71(8403)

Question 124916: Graph f(x) = 3x + 2.
Click here to see answer by jim_thompson5910(28708)

Question 124999: Jane invested some amount at the rate of 12% simple interest and some other amount at 10% simple interest. She received yearly interest of $130. Randy also invested, and received $4 more as interest. How much amount did each of them invest at differen rates?
Click here to see answer by checkley71(8403)

Question 125008: find two consecutive numbers whose product is 72
Click here to see answer by dolly(163)

Question 125012: find two consecutive odd numbers whose product is 255
Click here to see answer by josmiceli(9817)

Question 125012: find two consecutive odd numbers whose product is 255
Click here to see answer by jim_thompson5910(28708)

Question 125012: find two consecutive odd numbers whose product is 255
Click here to see answer by dolly(163)

Question 125017: the width of a rectangle is less than 27 cm in lenght.the area is 90 cm^2. find the lenght and width of the rectangle
Click here to see answer by stanbon(57962)

Question 125035: Translate the following into a quadratic equation, and solve it:
the length of a rectangluar garden is three times its width; if the area of the garden is 75 square meters, what are the dimensions?
Click here to see answer by solver91311(17077)

Question 125014: the difference between two times the square of a number and five times the number is 75. What is the number?
Click here to see answer by Edwin McCravy(8999)

Question 125099:
1.) 2x^2 - 5x – 10 = 0
2.) 3x^2 - 8x + 5 = 0
Click here to see answer by checkley71(8403)

Question 125220:
looked like a rectangle is 300 cm^2. the difference between length and width is 13 cm. find the lenght of the diagonal
Click here to see answer by checkley71(8403)

Question 125219: a number increased by twice the square root is 48. what is this number
Click here to see answer by checkley71(8403)

Question 125266: For questions 1-2, apply the quadratic formula to find the roots of the given function, and then graph the function.
1. (6 points) f(x) = x2 - 4
2. (6 points) g(x) = x2 - x - 12

Click here to see answer by Fombitz(13828)

Question 125323: What is the equation of the axis of symmetry of the function y=-2x^2-20x-47? I think the answer is x=-5 but I'm not sure. Can someone please explain?
Click here to see answer by jim_thompson5910(28708)

Question 125332: If a person earns an annual interest rate of 7% on an investment of $1500.00. Write the function that shows how much money the investor has at t,in years.
I think the answer is P(t)=1500(1.07)^t. Can someone please tell me if I am correct ?
Click here to see answer by Earlsdon(6294)

Question 125331: Simplify: (2^-1 - 3^-1)/((5/6))^-1) I think the answer is 5/36 but I'm not sure. Can someone please help me?
Click here to see answer by solver91311(17077)

Question 125331: Simplify: (2^-1 - 3^-1)/((5/6))^-1) I think the answer is 5/36 but I'm not sure. Can someone please help me?
Click here to see answer by cmerrill666(3)

Question 125322: What are the zeros of f(x)=x-40+6x^2 ? I think the answer is (-16,15) but I'm not sure.
Click here to see answer by scott8148(6628)

Question 125398: 5x <_ 25
solve and graph
I am struggling to understand how to solve these types of problems.
please try to show me step by step this process in order for me to understand my algebra book... (I am going to post a few more questions) Thank you for taking the time to help me.
Click here to see answer by jim_thompson5910(28708)

Question 125442: The graph of y=x^2 has been transformed according to the mapping rule (x,y)-(x+3,3y-1). What would the new graph look like????
Click here to see answer by Edwin McCravy(8999)

Question 125320: What is the quadratic function that has a vertex at (-1,-3) and a y-intercept of -4? I think the answer is y=-(x+1)^2-3. Can someone please let me know if I am correct?
Click here to see answer by ankor@dixie-net.com(15746)

Question 125483: How do i solve (3x-5)squard=12 by using the root propert?
Click here to see answer by josmiceli(9817)

Question 125483: How do i solve (3x-5)squard=12 by using the root propert?
Click here to see answer by MathLover1(6812)

Question 125435: Write the function to show a collectable doll that has doubled in value in 10 years. The initial value of the doll was $355.00.
I think it is y=355(2)^x/10 ???????????????
Click here to see answer by edjones(7569)

Question 125500:
3x^ -4x - 5 =0 use the quadratic formula
Click here to see answer by checkley71(8403)

Question 125441: What would the graph of the quadratic function with zeros 1/2 plus or minus sqrt7/3 look like ?
Click here to see answer by ankor@dixie-net.com(15746)

Question 125677: Use properties of exponents to simplify :
a) (9^1/2+25^1/2)^2
b) (25^-1/3)^-3/2
c) (a^6)/27)^-2/3

Click here to see answer by stanbon(57962)

Question 125680: Find the zeroes of the function without using technology:
y=(3^-2(x-4)) -sqrt27

Click here to see answer by stanbon(57962)

Question 125679: Solve for x:
A)(3^2x)-(10(3)^x) +9=0
B)(3^x)*(3^(x+3))/(27^x)*(9^2x)=729
Click here to see answer by uma(370)

Question 125683: the widthof a piece is 4 metres less than is length. the air in the room is 165 m^2. find the length and breadth of this piece
Click here to see answer by MathLover1(6812)

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