The graph in the xy-plane of which of the following equations is a circle?
1. 3xy = 6
2. x^2 - 4 = y
3. (x + 4)^2 = 36 + y^2
4. (x - 3)^2 = 25 - (y + 2)^2
4.(x - 3)^2 = 25 - (y + 2)^2
100
Find the area:
3 square units
200
Solve for x
|x + 2| = 9
{-11, 7}
200
f(x) = x(x + 1)
g(x) = x^2 - 1
The functions f and g are defined above. If f(a) = g(a), what is the value of a?
a = -1
200
b = 2
c = 3
< B = 40 degrees
Find < C
C = 74.62 degrees
300
Solve for x
(3x + 2)/9 - (2x + 1)/3 < -1
x > 8/3
300
Find t
4 = (t - 2(squareroot)3) (t + 2(squareroot)3)
t = +- 4
300
Find:
Integral of [6x * cos(2x^2)] from 0 to 1
= 3/2(sin2 - sin0)
400
Suppose that Derwin shot rounds of 82, 84, 78, 79 on the first four days of a golf tournament. What must he shoot on the fifth day of the tournament to average 80 or less for the five days?
He should shoot less than or equal to 77
400
Solve:
2x - y = 1
x + 2 = y
x = 3
y = 4
400
x^2 + y^2 + x + y - 1/2 = 0
Find center (h, k) and r