Solve.
= 
A. -4
B. -4, 4
C. -3, 3
D. 4
Answer: A
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Write the equation of the circle that satisfies the following conditions. Express the final equation in the form x2 + y2 + Dx + Ey + F = 0.Center at the origin and r = 4
A. x2 + y2 = 0 B. x2 - y2 - 16 = 0 C. x2 - y2 + 16 = 0 D. x2 + y2 + 16 = 0 E. x2 + y2 - 16 = 0
Find the exact circumference of the circle.
A. 101? yd B. 202? yd C. 50.5? yd D. 10,201? yd
Find the indicated term of the geometric sequence.6th term of 1, 3, 9, ...
A. a6 = 9 B. a6 = 729 C. a6 = 243 D. a6 = 2,187
Solve the problem.Erin was driving home from college. During the first day of driving, Erin averaged 62 miles per hour. On the second day, she drove at an average speed of 72 miles per hour. If her total driving time for the two days was 11
hours and the distance traveled was 768 miles, what was Erin's driving time for each day?
A. first day: 6 hr
second day: 5
hr
B. first day: 7 hr
second day: 4
hr
C. first day: 5 hr
second day: 6
hr
D. first day: 5
hr
second day: 6 hr