Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 633321: I think this is using the pythagorean theorem and I get really confused...
A mason wants to be sure he has a right angle corner of a building's foundation. He marks a point 3 ft from the corner along one wall and another point 4ft from the corner along the other wall. If the corner is a right angle, what should the distance be between the two marked points??
I did the a^2 + b^2 = c^2 formula and plugged in 3^2 + b^2 = 4^2 and got an -7 as an answer. I know a negative # can't be it so that's where I need assistance. Thanks in advance.
Click here to see answer by stanbon(75887)  |
Question 633337: Please shed some light on finding the solution.
If Emily hits a golf ball from the upper deck of a driving range (twelve feet above the ground) with an initial velocitynof 117 feet per second, after how many seconds should the ball land (assume her ball does not encounter any obstacles)? Round to the nearest tenth.
Click here to see answer by Alan3354(69443)  |
Question 633223: Aki's bicycle designs has determined that when x hundred bicycles are built, the average cost per bicycle is given by c(x)=0.2x²-1.3x+8.181, where c(x) is in hundreds of dollars.
The shop should build_____bicycles.
Click here to see answer by KMST(5328)  |
Question 633339: Please shed some light on finding the solution.
If Emily hits a golf ball from the upper deck of a driving range (twelve feet above the ground) with an initial velocity of 117 feet per second, after how many seconds should the ball land (assume her ball does not encounter any obstacles)? Round to the nearest tenth.
Click here to see answer by jsmallt9(3758) |
Question 633253: there were studied the effects on the rats fed on a diet that contains 10 % of protein. The protein was consisting in of yeast and cornflour. changing the percentage P of yeast in the miscellany of the above mentioned protein, it was estimated that the weight gained (in grams) of a rat in a period of time, it was f (p), where:
F (p) = - 1/50 P^2 + 2P+ 20... 0 ≤ P≤ 100. Find the máximum- weight.
Click here to see answer by jsmallt9(3758) |
Question 633640: I need help with a few problems that I have been working on but I can't seem to get exactly what it is I need, which is understanding how to work these problems and show my work. Please and thank you for any help you can offerme at this time.
Problem # 1: In this problem it asks to find the vertex, the line symmetry, and the maximum or minimum value of f(x). Graph the function. f(x)=1/3(x+6)^2+4.
Problem # 2: Find the variation constant and equation of variation where y varies directly as x and y=12 when x=2.
Problem #3: Rationalize the denominator. Assume that all expressions under radicals represent positive numbers. sq rt u-sq rt /sq rt u+sq rt v
Problem #4: Convert to decimal notation. 8.91*10^7
Problem #5: In a right triangle, find the length of the side not given. b=1, c=sq rt 10. The third length of the third side is?
Click here to see answer by Alan3354(69443) |
Question 633953: Determine which set of ordered pairs (x, y) represents y as a function of x.
(A){(1, 2), (6, 7), (6, 1), (7, 6)}, (B){(1, 2), (2, 1), (7, 7)}
(C){(1, 2), (2, 6), (1, 7)}, (D){1, 2, 6, 7}
Click here to see answer by jim_thompson5910(35256) |
Question 634449: I am a little confused on how to solve this. I need to solve and give exact and approximate solution to three decimal places. Any help, showing steps, would be really appreciated so I can understand how to do this type of problem. THanks.
y^2-18y+81=25
Click here to see answer by josmiceli(19441)  |
Question 634618: I know that the solutions of this problem are imaginary, but I don't think I solved it right. The problem is x^2+7x+14 and I believe the imaginary solutions are -7+iradical-7/2 and -7-iradical-7/2. Are these right?
Click here to see answer by ewatrrr(24785)  |
Question 634986: I'm stumped. Thank you for your help.
in a diving siblings showcase, 11-year old hannah takes off from a 24.61 foot platform with an initial velocity of 9.7 ft/sec at the same time her brother tyler, who is 3.5 years older, takes off from a 32.81 foot platform with an initial velocity of 4.51 ft/sec. Who enters the water first? By how much? Round to the nearest hundredth.
Click here to see answer by stanbon(75887) |
Question 634987: Q.1) The question reads "solve the equation x^2-1=8 by using the graph."
The graph has an open (upward facing) parabola. It has a y-intercept of -1; x-intercept's at -1, 1.
How do I answer this question? I'm not sure what I need to do...
Q.2) The question reads "express the following as a compound inequity and graph"
it states "x" is between -4 to 6.
There is a graph.
How do I properly answer this on the graph?
Thank you.
Click here to see answer by jsmallt9(3758) |
Question 635204: An arrow is shot into the air and its path is modeled by the function h(x) = -4.9t2 + 34.3t - 49 where "h" is the height of the arrow (given in meters) at any given time t (given in seconds). Find the number of seconds necessary for the arrow to reach its maximum height.
Thanks, it means a lot! :)
Click here to see answer by ewatrrr(24785) |
Question 635228: A chain store manager has been told by the main office that daily profit, P, is related to the number of clerks working that day, x, according to the equation P = -25x^2 + 450x. What number of clerks will maximize the profit?
Click here to see answer by ewatrrr(24785) |
Question 635345: A flat square piece of cardboard is used to construct an open box. Cutting a 3 feet by 3 feet square off of each corner and folding up the edges will yield an open box (assuming these edges are taped together). If the desired volume of the box is 147 cubic feet, what are the dimensions of the original square piece of cardboard?
Click here to see answer by mananth(16946)  |
Question 635426: Suppose that the equation p(x) = -5x^2 + 600x +100 (where x represents the number of items sold), describes the profit function for a certain business. How many items should be sold to maximize the profit?
Click here to see answer by ewatrrr(24785) |
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