Find the slope of the line passing through the points (-3, -10) and (4, 5).

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Asked 1/13/2013 6:42:00 PM

Updated 11/19/2014 11:11:25 PM

5 Answers/Comments

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Flagged by janezeshun [11/19/2014 11:11:25 PM]

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Question

Asked 1/13/2013 6:42:00 PM

Updated 11/19/2014 11:11:25 PM

5 Answers/Comments

This conversation has been flagged as incorrect.

Flagged by janezeshun [11/19/2014 11:11:25 PM]

Rating

8

The slope of the line passing through the points (10, 0) and (0, 3) is -3/10 .

Slope = (3 - 0)/(0 - 10) = 3/-10 = -3/10 .

Slope = (3 - 0)/(0 - 10) = 3/-10 = -3/10 .

Added 11/19/2014 10:33:38 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [11/20/2014 10:36:32 AM], Rated good by andrewpallarca

8

The difference between the ages of two friends is 2 years. The sum of their ages is 74 years. Find the age of the older friend is 38.

Let the older friend is a , younger friend is b ,

a + b = 74

a - b = 2

a = 38 , b = 36 .

Let the older friend is a , younger friend is b ,

a + b = 74

a - b = 2

a = 38 , b = 36 .

Added 11/19/2014 10:43:44 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [11/20/2014 10:37:38 AM], Rated good by andrewpallarca

8

Janet invested $26,000, part at 6% and part at 3%. If the total interest at the end of the year is $1,080, she invest &10000 at 6% .

Let the amount at 3% and 6% is a , b

a + b= 26000

3%a + 6%b = 1080

a = 16000 , b = 10000 .

Let the amount at 3% and 6% is a , b

a + b= 26000

3%a + 6%b = 1080

a = 16000 , b = 10000 .

Added 11/19/2014 10:50:16 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [11/20/2014 10:38:09 AM], Rated good by andrewpallarca

8

The vertex of the parabola y = -4x2 - 16x - 11 is (-2 , 5).

x-coordinate = 16/(-4)*2 = 16/-8 = -2

when x = -2

y = -4*(-2)^2 - 16*(-2) - 11

y = -16 + 32 - 11

y = -27 + 32

y = 5 .

x-coordinate = 16/(-4)*2 = 16/-8 = -2

when x = -2

y = -4*(-2)^2 - 16*(-2) - 11

y = -16 + 32 - 11

y = -27 + 32

y = 5 .

Added 11/19/2014 10:53:03 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [11/20/2014 10:39:38 AM], Rated good by andrewpallarca

8

The amount of revenue a company makes per day by selling x items is given by the function f(x) = 14x - 0.2x^2. 35 items should be sold if the company wants to maximize their profit

f(x) = 14x - 0.2x^2

x - item = -b/2a = -14/(2*(-0.2)) = -14/-0.4 = 35

when x = 35 , f(x) is the largets .

f(x) = 14x - 0.2x^2

x - item = -b/2a = -14/(2*(-0.2)) = -14/-0.4 = 35

when x = 35 , f(x) is the largets .

Added 11/19/2014 11:10:38 PM

This answer has been confirmed as correct and helpful.

Confirmed by andrewpallarca [11/20/2014 10:41:11 AM], Rated good by andrewpallarca

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