Q: The equation a = 640s gives the relationship between s square miles and a acres. Pam owns 7.5 square miles of farmland. How many acres does she own?
A. 480 acres
B. 11.72 acres
C. 4,800

acres
D. 1.17 acres

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Question

Asked 7/8/2012 10:51:19 PM

Updated 7/13/2014 7:42:40 PM

4 Answers/Comments

This conversation has been flagged as incorrect.

Flagged by yeswey [7/13/2014 7:35:53 PM]

Rating

3

The slope of the line through the pair of points A(2, –3), P(2, 9) is undefined.

Added 7/13/2014 7:35:50 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [7/14/2014 10:58:24 AM]

3

The rule for the linear function in the table is y = -4x.

x f(x) –4 16 0 0 4 –16 8 –32

when x = -4, y = -4(-4) = 16

when x = 0, y = -4(0) = 0

when x = 4, y = -4(4) = -16

when x = 8, y = -4(8) = -32

x f(x) –4 16 0 0 4 –16 8 –32

when x = -4, y = -4(-4) = 16

when x = 0, y = -4(0) = 0

when x = 4, y = -4(4) = -16

when x = 8, y = -4(8) = -32

Added 7/13/2014 7:37:43 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [7/14/2014 10:58:52 AM]

3

The two numbers with a sum of 20 and a difference of 14 are 3 and 17.

Let x and y be the two numbers then:

x + y = 20

x - y = 14

adding up equations the result is:

2x = 34

x = 34/2 = 17

17 + y = 20

y = 20 - 17 = 3

Let x and y be the two numbers then:

x + y = 20

x - y = 14

adding up equations the result is:

2x = 34

x = 34/2 = 17

17 + y = 20

y = 20 - 17 = 3

Added 7/13/2014 7:39:20 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [7/14/2014 10:59:21 AM]

3

The coordinates of the point (–10, –3) after a 180 clockwise rotation about the origin is (10, 3).

Added 7/13/2014 7:42:40 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [7/14/2014 10:59:43 AM]

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