Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 242986: Explain how you would find the x-intercepts and y-intercept for quadratic
functions? Are there situations where graph of quadratic functions have
only one x-intercept? Situations where there are no x-intercepts?

Click here to see answer by stanbon(57224)

Question 242975: Given that one of the roots of the quadratic equation 4x^2-(p-2)x-2p=5 is negative of the other root,find
(a)the value of p,
(b)the roots of the quadratic equation
Click here to see answer by stanbon(57224)

Question 242538: the path of a golf ball hit at an angle of about 10 degrees to the horizontal can be modelled by the function h= -0.002dsquared + 0.4d
where h is the height of the ball, in metres, and d is the horizontal distance the ball travels, in metres, until it first hits the ground.
a. What is the maximum height reached by the ball?
b, What is the horizontal distance of the ball from the golfer when the ball reaches its maximum height?
c. What distance does the ball travel horizontally until it first hits the ground?
Click here to see answer by Alan3354(30968)

Question 243052: how do you solve -3/u+1=-8+7/u+2
Step 1: Group like terms together
-3/u-7/u = -8+2-1
Step 2: find LCF of the demoninators of the equation at the left of the equal sign. Here you will realise that U is the LCF and so factorised as
-3-7/U = -7
Step 3: Solve for U value
-10/U = -7
Mutliply both sides by U
(U)-10/U = -7(U)
The two Us at left will cancel themselves and you will have:
-10 = -7U
Divide both sides by -7:
-10/-7 = -7U/-7
At the left the negatives will cancel themselves and at the right -7 as a demoninator will cancel the numerator.
Therefore, the final answer will be:
10/7 = U or U = 1 whole number, 3 over 7 (Mixed fraction)

Click here to see answer by freekie11(2)

Question 243116: b) y = x2 – 4x + 5
Use the values of x provided in the table.

x y
0
1
2
3
4
Click here to see answer by edjones(7569)

Question 243164: find three values of k for which the expression is factorable
Click here to see answer by checkley77(12569)

Question 243190: Factor completely
175v^2+490vt+343t^2

Click here to see answer by checkley77(12569)

Question 243287: Use the quadratic formula to solve the equation. all solutions are real numbers
4x^2-4x-8=0
Click here to see answer by checkley77(12569)

Question 243287: Use the quadratic formula to solve the equation. all solutions are real numbers
4x^2-4x-8=0
Click here to see answer by College Student(505)

Question 243355: I have to solve this using the quadratic equation
3x^2+2x+5=0
Click here to see answer by checkley77(12569)

Question 243356: I have to solve using the quadratic formula
2/x + 5/x+2 = 1
Click here to see answer by edjones(7569)

Question 243356: I have to solve using the quadratic formula
2/x + 5/x+2 = 1
Click here to see answer by checkley77(12569)

Question 243530: Solve 7x^2+28x=49 by completing the square. I know you use the formula (b/2)^2 right?
Click here to see answer by jim_thompson5910(28476)

Question 243560: (5x + 3)^2 - 5 = 49
Click here to see answer by jim_thompson5910(28476)

Question 243570: (7x + 9)^2 - 7 = 43
Click here to see answer by jim_thompson5910(28476)

Question 243564: write an algebraic expression for thr given quantity. let x represent the unknown value nine times a number reduced by four.
Click here to see answer by AliciaBee(1)

Question 243590: I am struggling on a few word problems on my homework, please help me, it is due tomorrow!
You have 280 feet of fencing. Do you have enough to fence a rectangular region with an area of 4850 sq. ft. ?
and...
In 1987, your uncle opened a neighborhood grocery store. for 1987-2007 his annual sales, S(in millions of dollars) could be modeled by S= -0.035t^2 + 0.8t + 0.5 where t=0 represents 1987. During which years of operation were his annual sales 3 million dollars?
Click here to see answer by oberobic(2304)

Question 243559:
Click here to see answer by checkley77(12569)

Question 243535: Please answer this question:
You have a pool that measures 8 yards by 10 yards. You want to build a deck around all four siddes of the pool and you want to increase the total area to 120 square yards. The deck is the same width on both sides forming a perfect rectangle. What is the width of the deck?
Click here to see answer by checkley77(12569)

Question 243649: solve the equation 8x^3 + 4x^2 - 18x - 9 = 0 algebraically for all values of x?
Click here to see answer by Edwin McCravy(8880)

Question 243614: Find two positive numbers such the sum of the first and twice the second is 100 and their product is as large as possible?
Click here to see answer by Edwin McCravy(8880)

Question 243867: I am suppose to find out if this equations S= -0.0643t^2 + 3.2152t + 23.9801 is a good equation to base off a companies salary.
I figured it wasn't because it happens to be a parabole that goes down after 25 years of experience. I thought of tbe possibility of people staying at a job for 25 years is highly unlikely but possible... so I figured 18yrs + 25yrs = 43 years of age.
So I figured lowering a employees salary at the age of 44 and on was unethical.
Plus the pay rate increase beforehand was just way to fast and high...
What would you suggest would be a good solution for this company to pay salaries in a equation. It doesn't have to be a quadratic equation but I must be able to graph it.

Click here to see answer by solver91311(16868)

Question 244009: What is the quadratic equation of 4x^2-8x-9=0
(simplifiy your answer. type an exact answer using radicals as needed. Use integers or fractions for any number in the expression. Express complex numbers in the form of i.)
Click here to see answer by mathitutor(25)

Question 244008: What is the quadratic equation of 4x^2-8x-9=0
(simplifiy your answer. type an exact answer using radicals as needed. Use integers or fractions for any number in the expression. Express complex numbers in the form of i.)
Click here to see answer by mathitutor(25)

Question 244090: how do u solve 2x squared-13x+6=0 in completing the square
Click here to see answer by solver91311(16868)

Question 244098: 8u^3v^0*10uv^9
Click here to see answer by checkley77(12569)

Question 244184: how do you solve this equation 9x² - 4x - 5 = 0
Click here to see answer by checkley77(12569)

Question 244409: a town population is 5400 in year 2010, show 3% growth for 3 years
Click here to see answer by rfer(12646)

Question 244456: how many x-intercept are there for the quadratric funtion y=x^2-6x+9
Click here to see answer by nyc_function(2733)

Question 244515: Use the quadratic formula to find the roots of the equation. Round to tenths if necessary. 3x2 - 4x - 8 = 0
Click here to see answer by solver91311(16868)

Question 244344: Write the quadratic equation in general form. What is the value of b2 - 4ac? 1 = 2x2 + 7x
Click here to see answer by solver91311(16868)

Question 244521: Use the quadratic formula to find the zeros of the function. y = 16x2 + 40x + 25
Click here to see answer by solver91311(16868)

Question 244520: Use the quadratic formula to find the zeros of the function. Round to tenths if necessary. y = 3x2 + 5x
Click here to see answer by solver91311(16868)

Question 244634: Write the expression 13m^8-3m^4+4 in quadratic form, if possible?
Click here to see answer by jim_thompson5910(28476)

Question 244688: for what values of b will the quadratic equation x^2+bx+10=0 have no real roots?
Click here to see answer by edjones(7569)

Question 244790: how do you factor
x^2=8x
Click here to see answer by edjones(7569)

Question 244784: How would I simplify √6 * √30/√10
Click here to see answer by richwmiller(9135)

Question 244641: Hi! I was wondering if anyone could walk me through how to do this problem?
Write a quadratic function given the following:
(-1,6), (1,4), (2,9)
y=
Thanks!
Click here to see answer by ankor@dixie-net.com(15628)

Question 244806: For the following equation, state the value of the discriminant and then describe the nature of the solutions.
2x^2-10x-12=0
What is the value of the discriminant?
Which one of the statements below is correct?
a. The equation has two imaginary solutions.
b. The equation has two real solutions.
c. The equation has one real solution?
Thanks for your help!
Click here to see answer by jim_thompson5910(28476)

Question 244844: what kind of roots does x^2+2x+8=0 have?
Click here to see answer by edjones(7569)

Question 244844: what kind of roots does x^2+2x+8=0 have?
Click here to see answer by richwmiller(9135)

Question 244844: what kind of roots does x^2+2x+8=0 have?
Click here to see answer by rapaljer(4667)

Question 244844: what kind of roots does x^2+2x+8=0 have?
Click here to see answer by jsmallt9(3296)

Question 244903: what is the area of 60m by 8m
Click here to see answer by Mr. Feliz(12)

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