Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 157874: one person proofreads a copy for a small newspaper in 4 hours. If a second proofreader is also emplyoed, the job can be done in 2.5 hours. how long does it take for the 2nd proofreader to do the job alone.
Click here to see answer by vleith(2825)  |
Question 157876: I've been working on an assignment and I'm stumped. I have to solve quadratic equations with the following steps:
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 x2 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.
3) 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 equal to the negative square root of thenumber on the right side of the euqation and solve for x.
I have two equations I'm stuck on:
1) x2 - 2x - 13 = 0
2) 2x2 - 3x - 5 = 0
Click here to see answer by MathLover1(6614)  |
Question 157758: Two television monitors sitting beside each other on a shelf in an appliance store have the same screen height. One has a conventional screen, which is 3 inches wider than it is high. The other has a wider, high-definition screen, which is 1.8 times as wide as it is high. The diagonal measure of the wider screen is 15 inches more than the diagonal measure of the smaller. What is the height of the screens, correct to the nearest 0.1 inch?
I tried the Pythagorean theorem & got 2w^2+6w+24=d^2 and got stuck.
Click here to see answer by Fombitz(13828)  |
Question 157892: If your test scores are 80 and 100, then the arithmetic mean of you scores is 90. The geometric mean of the scores is a number h such that
80/h=h/100
Are you better off with the arithmetic mean or the geometric mean?
Click here to see answer by Fombitz(13828) |
Question 158127: I need some help on one of my math questions, I've included a picture of the diagram below
Consider the following open-top box layout with cuts (solid lines) and folds (dotted lines as indicated. The box is made by cutting out the corners but leaving sufficient material as flaps for gluing or tucking in.
http://picasaweb.google.com/swede5670/Math#5248354434228399282
Express the volume V of the resulting box as a function of the length of the corner cutout, X
Click here to see answer by nerdybill(6948)  |
Question 158644: The problem I am trying to figure out is: (a-2)^2=8 I have to use the square root property. I have no idea what I am doing wrong but this is what I have so far.sqrt[(a-2)^2]= +or-sqrt[8]
=a-2=+or-2
==a-2+2=3+or-2
a=3+or-2
a=3+2
a=5
or
a=3-2
a=1
Could you please tell me I have done wrong. And could you show the steps and explain this to me. I just don't understand. Thank you.
Click here to see answer by Alan3354(30959)  |
Question 159089: A farmer with 10,000 meters of fencing wants to enclose a rectangular field and then divide it into three plots with two fences parallel to one of the sides. What is the area that can be enclosed? I need to find the vertex but cannot figure out how to solve this problem. (Analyzing Graphs of Quadratic Functions).
Click here to see answer by ankor@dixie-net.com(15624)  |
Question 159246: hey,
could you please solve the following problem for me, and thank you.
Sammy McWire hits a massive pop-up. the height h, in meters, of the ball is
given by h = 1.2+20t-5t^2, where t is in seconds. what is the maximum height
of the ball? if it is caught at the same height at which it was hit. how long
is it in the air?
i will be waiting for the solution,
and thank you again,
Click here to see answer by jim_thompson5910(28476) |
Question 159293: Hi,
i am having trouble finding the answer to this:
The following equations have repeated roots. find the value(s) of the constant p leaving your answer(s) in exact form.
(p-1)x^2 + 6x + (p+7) = 0
i have been trying to figure it out for a while now and i have looked in the text book and the answers are -8 and 2, but i want to know how i can get these answers.
Thanks.
Click here to see answer by jim_thompson5910(28476) |
Question 159309: I am stumped on this problem. 3x^2-x-1=0. I am needing to solve it by either quadratic equation or finding the square root. Has to be completely worked out with all steps.
If anyone could help I would appreciate it. This is the last question on my assignment.
Thank you,
Renee
Click here to see answer by jim_thompson5910(28476) |
Question 159818: f(x)= x^2+6x-4 is the function
The questions are.
a.what is the vertex of the parabola?
b.what is domain and range?
c.find the interval over which the function is increasing?decreasing?
d.approximate the zeros of the function using the calculater?
for a. i got (3,13) is that right?
for b. i got domain(-inf,inf) range [13,inf)
for c. increasing [13,inf) decreasinf (-inf,13]
for d i dont know how to do
Please help!
Click here to see answer by jim_thompson5910(28476) |
Question 159913: Ok, A retailer spent $48 to purchase a number of special mugs. Two of them were broken in the store, but by selling each of the remaining mugs for $3 above the original cost per mug, she made a total profit of $22. Need to solve for the number of mugs originally purchased? Denoted by n. Having issues wrapping my head around it, would be very thankful for any help. dwr825
Click here to see answer by stanbon(57222) |
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