marshall1432
Banned
- Joined
- Jan 10, 2007
- Messages
- 80
1. Find the y-intercept(s) of the parabola given by the function f(x) = 3x2 + 4.
my answer: insert f(x) in for the y function and graph, find points.
2. Find the x-intercept(s), if any, of the parabola given by the function f(x) = 2x2 + 4x - 6.
my answer: same as #1, just find the x values
3. Find the axis of symmetry of the parabola given by the function f(x) = -x2 + 2x + 1.
my answer: i don't know, can someone shoe me step by step on this one.
4. Find the vertex of the parabola given by the function f(x) = 4x2 - 2x, expressing non-integer values in fractional form. State whether the parabola opens up or down.
my answer: I believe it opens down, but I can't get it to graph exactly right.
5. The daily cost C (in dollars) to produce x portable 12-inch TVs is given by
C(x) = x2 - 60x + 3000
How many TVs should be produced to minimize the cost? What is the minimum cost?
my answer: i substituted 400 in and the number was really high, and the same for 4000, just to see if i was getting close to the answer. i was wondering if there might be a possible formula to use on this one? thanks.
my answer: insert f(x) in for the y function and graph, find points.
2. Find the x-intercept(s), if any, of the parabola given by the function f(x) = 2x2 + 4x - 6.
my answer: same as #1, just find the x values
3. Find the axis of symmetry of the parabola given by the function f(x) = -x2 + 2x + 1.
my answer: i don't know, can someone shoe me step by step on this one.
4. Find the vertex of the parabola given by the function f(x) = 4x2 - 2x, expressing non-integer values in fractional form. State whether the parabola opens up or down.
my answer: I believe it opens down, but I can't get it to graph exactly right.
5. The daily cost C (in dollars) to produce x portable 12-inch TVs is given by
C(x) = x2 - 60x + 3000
How many TVs should be produced to minimize the cost? What is the minimum cost?
my answer: i substituted 400 in and the number was really high, and the same for 4000, just to see if i was getting close to the answer. i was wondering if there might be a possible formula to use on this one? thanks.