# Need Help wtih all of these functions!

• Mar 11th 2007, 03:51 PM
Need Help wtih all of these functions!
1. Let http://hosted.webwork.rochester.edu/...6b8d733351.png Find http://hosted.webwork.rochester.edu/...4163dd1fa1.png

2.Find all solutions of the equation http://hosted.webwork.rochester.edu/...146179e861.pngand express them in the form http://hosted.webwork.rochester.edu/...b3618a6031.png
solutions:

3.Evaluate the expression http://hosted.webwork.rochester.edu/...8f5e9f36a1.pngand write the result in the form http://hosted.webwork.rochester.edu/...aa039b2031.png.
The real number a =____
The real number b =____

4.Find the perimeter of the triangle with the vertices at
(2, 1), (-4, 5), and (-5, -2).

5.Consider the two points (1,-1) and (7,6). The distance between them is:__
The x co-ordinate of the midpoint of the line segment that joins them is:___
The y co-ordinate of the midpoint of the line segment that joins them is: ___

6.Two ships leave a harbor at the same time, traveling on courses that have an angle of 130degrees between them. If the first ship travels at 22 miles per hour and the second ship travels at 28 miles per hour, how far apart are the two ships after 2.9 hours?
• Mar 11th 2007, 04:27 PM
ThePerfectHacker
Quote:

Originally Posted by badandy328

4.Find the perimeter of the triangle with the vertices at
(2, 1), (-4, 5), and (-5, -2).

Let A(2,1) B(-4,5) C(-5,-2).

Find,
distance(A,B)=X

Find,
distance(A,C)=Y

Find,
distance(B,C)=Z

X+Y+Z

Quote:

5.Consider the two points (1,-1) and (7,6). The distance between them is:__
The x co-ordinate of the midpoint of the line segment that joins them is:___
The y co-ordinate of the midpoint of the line segment that joins them is: ___
sqrt((1-7)^2+(-1-6)^2}=sqrt(36+49)=sqrt(85)

The midpoint is,
(4,2.5)
• Mar 11th 2007, 04:35 PM
Quote:

Originally Posted by ThePerfectHacker
Let A(2,1) B(-4,5) C(-5,-2).

Find,
distance(A,B)=X

Find,
distance(A,C)=Y

Find,
distance(B,C)=Z