Also, I belive that #4 is D. I drew out a graph and it is symmetrical to point A.
After looking over #3, I got B because axis of symmetry is -b/2a, so it would be 6/2(1)= 3.
I need help on how to do the following problems:
1. The graph of x^2 + y^2 = 100 will contain which of the following points?
A. (-6, -8)
B. (10, 1)
C. (10, -6)
D. (4, 6)
2. Write an equation for a circle whose center is at the origin and whose radius is square root of 7.
A. x^2 + y^2 = square root of 7
B. x^2/7 + y^2/7 = 1
C. x^2/5 + x^2/5 = 7
D. x^2/4 + y^2/3 = 1
3. Find the equation for the axis of symmetry for y= x^2-6x+5
A. y=0
B. x=3
C. y=5
D. x=1
4. Given A (4, -5), Find the coordinate of point B that is symmetric to A with respect to the x-axis.
A. (-4,-5)
B. (-4,5)
C. (-5,4)
D. (4,5)
5. There is a graph of a circle with points going through points (0,6),(0,-6), (8,0) and (-8,0).
The graph above would correspond to which of these equations?
A. x^2 - y^2 = 8
B. sq. rt. of 2x^2/4 + sq. rt. of 2x^2/4 = 1
C. x^2/64 + y^2/64 = 1
D. x^2 + y^2 = 8
We are not inclined to do work for students here. However, if you need your work or thinking critiqued, we will be happy to do that.
I just need to know how to find the answer, and I don't even know where to begin.
ok, i think i figured out how to do #1... because -6^2 is 36 and -8^2 is 64 and 36+64= 100, i think it is A.
1 answer