Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 608104: Express using positive exponents. Then, if possible, simplify.
(−3)−4
Not sure if it written correctly. (-3)^-4.
Click here to see answer by jim_thompson5910(28715)

Question 608106: Simplify. Assume that no denominator is 0 and that 00 is not considered.
(5a)2. Might be also written as (5a)^2. Not sure which way to write it.

Click here to see answer by jim_thompson5910(28715)

Question 608152: an arrow is fired into the air with an initial velocity of 160 feet per second. The height in feet of the arrow t seconds after it was shot into the air is given by the function h(t)= -16t^2+160t. find the maximum height of the arrow.
Click here to see answer by Alan3354(31518)

Question 608165: The length and width of a rectangle must have a sum of 116 feet. find the dimensions of the rectangle whose area is as large as possible. answer should include length in feet and width in feet.
Click here to see answer by solver91311(17077)

Question 607972: Use the set builder notation to describe each of the sets below:
(i) { G, D , I , O , R , E , S , T , A }
(ii) { -7 , -5 , -3 ,-1, 1 , 3 , 5 }

Click here to see answer by richard1234(5390)

Question 608293: Graph the solution to the set y ≤ 3x^2 + 2x + 5
Click here to see answer by stanbon(57966)

Question 608352: Complete the square and write the equation in standard form.Then give the center and radius of the circle. x^2+y^2+18x+8y=-93
Click here to see answer by solver91311(17077)

Question 608399: Would someone please help me with this equation??!!!!?!?!!!
Find the vertex, the line of symmetry, the maximum or minimum value of the quatratic function and graph the function.
f(x) = -2x^2 + 2x + 6
The question asks for:
x-coordinate
y-coordinate
The equation line of symmetry
The minimum or maximum value of the quadratic function
and whether or not the value of f(1/2) = 13/2 is a minimum or maximum
also, the graph
Click here to see answer by lwsshak3(6755)

Question 608486: (x+2)^2+144
Click here to see answer by lynnlo(4169)

Question 608521: find the vertex of the following:
y=(x-5)^2
y=(x+3)^2
y=(x-1)^2
y=x^2+8
y=x^2-5
y=x^2+2
Click here to see answer by ewatrrr(10682)

Question 608555: Solve the following quadratic equation by using the square root property.
2(x-1) squared =72
Click here to see answer by ewatrrr(10682)

Question 608566: Would someone please help me. I forgot how to do this kind of problem.
Use the foil method to find the product
(6x^2 - 4)(x^6 - 5)
Click here to see answer by stanbon(57966)

Question 608563: Use the quadratic formula to solve the equation. I forgot how to do this. Can someone please help me
x^2 - x = -1
Click here to see answer by stanbon(57966)

Question 609030: Use the technique of completing the square to transform the quadratic equation below into the form (x + c)2 = a.
4x2 + 16x + 12 = 0
Click here to see answer by flame8855(424)

Question 609090: x^2 + 5x + 6 =0
Click here to see answer by jim_thompson5910(28715)

Question 609128: Help please!
Instructions: Use the quadratic formula to solve the equation
2x^2-x=-7
My answer is 1+i√55/4, 1-i√55/4.
Is this in the correct form or it should be 1+√55/4, 1-√55/4 and on the side the i?
Thanks
Click here to see answer by ewatrrr(10682)

Question 609126: how we make quadratic equation?

Click here to see answer by Edwin McCravy(8999)

Question 609126: how we make quadratic equation?

Click here to see answer by unlockmath(1614)

Question 609154: Y=2x(squared)-8x-1
i wanna know the a vaule b vaule and c vaule i also wanna know if it opens up or down? the axis of symmetry the vertex the domain and the range
Click here to see answer by ewatrrr(10682)

Question 609107: Using the discriminant, find the number of x-intercepts for the equation y=-3x^2-6x+12
Click here to see answer by nerdybill(7003)

Question 609161: hello i am an eight grader and i am having a hard time with quadratic equations they don't make a lot of sense to me and i am having a very stressful time can some one please help me understand?
Click here to see answer by Edwin McCravy(8999)

Question 609180: The solution of a quadratic equation can be found by graphing each side separately and locating the points of intersection
Solve: 3x^2 + 2x + 5 = 6x^2
How would I do this on the calculator?
Click here to see answer by solver91311(17077)

Question 609152: lauren dove into a swimming pool from a 15-foot-high diving board with an intitial upward velocity of 8 feet per second.the equation h(s)= -16s(square root)+8s+15 models the height (H) after (S) after she jumps off the diving board.
i wanna know how to find the time in seconds,it took lauren to enter the water.
also i wanna know what was the greatest height lauren reached when diving?

Click here to see answer by ankor@dixie-net.com(15746)

Question 609528: The expression x^2 + 50x + 625 factors into (x + a)^2. What is the value of "a"?

Click here to see answer by richwmiller(9144)

Question 609449: ) List the members of each of the sets below:
(i) { x:x is a square of an integer and 100 (ii) {x:x is a solution of the equation x^2 - 6x +4 = 0}

Click here to see answer by jsmallt9(3296)

Question 609582: Since all quadratic expressions form parabolas, are all parabolas quadratic expressions?
Click here to see answer by solver91311(17077)

Question 609634: rewrite the equation so the left side of the equation is expressed as a perfect square. x2+10x= -22
Click here to see answer by richwmiller(9144)

Question 609643: A soccer ball is kicked vertically at 33 ft/sec. How high does it go? Use the formula

Click here to see answer by Alan3354(31518)

Question 609876: how do you find the roots of 9x^2-650=0
Click here to see answer by umnikmo(75)

Question 609912: what are the formulas?
Click here to see answer by richwmiller(9144)

Question 609976: Can someone help me with this problem.
The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by n(x) = -0.5x^2+13x+11, where x is the number of days since the concert was first announced. When will daily tickets sales peak and how many tickets will be sold that day.
Click here to see answer by stanbon(57966)

Question 610087: the area of a rectangular field is 2275 . The field is enclosed by 200 m of fencing. What are the dimensions of the field
Click here to see answer by flame8855(424)

Question 610063: I am doing "Applications of Quadratic Equations" and the textbook constantly asks 'What are the possible values for t, h whatever'.
Eg. h=16t-4t^2 or h=-1/16(d-10)^2 + 9
I am trying to find the possible values for the pronumeral subsitituiting x.
I have tried the quadratic formula which gave me the correct solution for h=-1/16(d-10)^2 + 9 but not h=16t-4t^2.
How else can I solve this question without trial and error (which takes forever?)
THANKYOU!

Click here to see answer by KMST(1936)

Question 610329: find the value of c that completes the square
a^2 + 22/13a + c
Click here to see answer by Alan3354(31518)

Question 610322: Find the value that completes the square
x^2 - 38x + c
Click here to see answer by Alan3354(31518)

Question 610240: 3x2 + 7x > -12
Click here to see answer by jsmallt9(3296)

Question 610508: The length of a rectangle is 2 times its width. The area of the rectangle is 72
square inches. Find the dimensions of the rectangle.
How would I solve this by factoring?
Click here to see answer by jsmallt9(3296)

Question 610554: I could use some help on this problem.
Which of these is the first step in solving x^2 + 6x + 1 = 0 by completing the square?
a. (x + 6)^2 = -1
b. x^2 + 6x = -1
c. x^2 + 6x + 9 - 9 + 1 = 0
d. (x + 6)^2 + 1 = 1
I came up with A., but I'm not sure if that is correct.

Click here to see answer by Alan3354(31518)

Question 610696: finding a quadratic equation with a given roots
Click here to see answer by jsmallt9(3296)

Question 610715: use factoring to find the zeros of y=x2-7x-8 and the axis of symmetry
Click here to see answer by scott8148(6628)

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