Tutors Answer Your Questions about Quadratic Equations (FREE)
Question 1121411: A ball is short from a cannon into the air with an upward velocity of 40ft/seconds.The equation that gives the height (h) of the ball at any time (t) is: h=-16t^+40tc1.5. How long did it take for the ball to reach the ground?
Click here to see answer by Alan3354(69443)   |
Question 1121549: The expression s^2 is used to calculate the area of a square, where S is the side length of the square. what does the expression (8x)^2 represent?
a. The area of a square with a side length of 8.
b. The area of a square with a side length of 16
c. The area of a square with a side length of 4x
d. The area of a square with a side length of 8x
Click here to see answer by ikleyn(52748)  |
Question 1121907: the number of new cars purchased in a city can be modeled by the equation C=20t2 + 135t + 3050, where C is the number of new cars and t =0 corresponds to the number of new cars purchased in 198. in what year will the number of new cars purchased reach 15,000
Click here to see answer by ikleyn(52748) |
Question 1121910: A ball is thrown straight upward from the ground and attains a height of 𝑠(𝑡) = −16𝑡^2 +128𝑡 +4 metres above the ground after t seconds.
Question 1
When does the ball reach the maximum height?
Question 2
What is the maximum height that the ball can reach?
Click here to see answer by ikleyn(52748) |
Question 1122448: problem solving using quadratic functions:
Assume the perimeter of a rectangle is P and that the area is to be maximized. Let x represent the width of the rectangle. Using quadratic functions, show that the rectangle must be a square.
Click here to see answer by ikleyn(52748) |
Question 1122448: problem solving using quadratic functions:
Assume the perimeter of a rectangle is P and that the area is to be maximized. Let x represent the width of the rectangle. Using quadratic functions, show that the rectangle must be a square.
Click here to see answer by htmentor(1343)  |
Question 1122539: Section about graphing quadratic inequalities:
Select the correct range for each quadratic inequality below. Assume a>0.
1. y is bigger than or equal to a(x-h)^2+k
2. y< a(x-h)^2+k
3. y> a(x-h)^2+k
4. y is smaller than or equal to a(x-h)^2+k
Choices:
A. Real number
B. {y|y>k}
C. {y|y
D. {y|y is bigger than or equal to k}
E. {y|y is smaller than or eual to k}
F.No solution
This is a multiple choice question so I would really appreciate it if you could include the answers.
Click here to see answer by ikleyn(52748) |
Question 1122567: True or False? Explain your answer briefly.
(a) For any real number c , the quadratic equation x^2 + x - c^2 = 0 has two distinct (real) solutions.
(b) If a > 4 , then the equation ax^2 + 4x + 1 = 0 has no (real) solutions.
(c) If b^2 − 4ac ≥ 0, then the quadratic equation ax^2 + bx + c = 0 has at most one solution.
Help with this question would be greatly appreciated!
Click here to see answer by greenestamps(13195)  |
Question 1122567: True or False? Explain your answer briefly.
(a) For any real number c , the quadratic equation x^2 + x - c^2 = 0 has two distinct (real) solutions.
(b) If a > 4 , then the equation ax^2 + 4x + 1 = 0 has no (real) solutions.
(c) If b^2 − 4ac ≥ 0, then the quadratic equation ax^2 + bx + c = 0 has at most one solution.
Help with this question would be greatly appreciated!
Click here to see answer by josmiceli(19441)  |
Question 1122567: True or False? Explain your answer briefly.
(a) For any real number c , the quadratic equation x^2 + x - c^2 = 0 has two distinct (real) solutions.
(b) If a > 4 , then the equation ax^2 + 4x + 1 = 0 has no (real) solutions.
(c) If b^2 − 4ac ≥ 0, then the quadratic equation ax^2 + bx + c = 0 has at most one solution.
Help with this question would be greatly appreciated!
Click here to see answer by ikleyn(52748) |
Question 1122567: True or False? Explain your answer briefly.
(a) For any real number c , the quadratic equation x^2 + x - c^2 = 0 has two distinct (real) solutions.
(b) If a > 4 , then the equation ax^2 + 4x + 1 = 0 has no (real) solutions.
(c) If b^2 − 4ac ≥ 0, then the quadratic equation ax^2 + bx + c = 0 has at most one solution.
Help with this question would be greatly appreciated!
Click here to see answer by Alan3354(69443) |
Question 1122966: A real estate company owns 228 efficiency apartments, which are fully occupied when the rent is $990 per month. The company estimates that for each $25 increase in rent, 5 apartments will become unoccupied. What rent should be charged so that the company will receive the maximum monthly income?
Click here to see answer by ikleyn(52748) |
Question 1122569: Let a, b be two positive numbers.
Decide whether the given statement is true or false. Give a proof or a counterexample.
(a) If a + b ≤ 1/2, then ((1 − a)/a) * ((1 − b)/b) ≥ 1 .
(b) If ((1 − a)/a)* ((1 − b)/b) ≥ 1, then a + b ≤ 1/2
Thank you for your time and help!
Click here to see answer by math_helper(2461)  |
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