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3 years ago

6

I also need help with this question: One day at 3:00 a.m., the temperature was -13F in Kodiak, Alaska. At 10:00 a.m., the temper

ature was 22F. What was the average change in temperature per hour?

2 answers:

insens350 [35]3 years ago

6 0

Over 7 hours the temperature changed 35 degrees
35/7 gives you 5 degrees per hour

nadezda [96]3 years ago

6 0

5 degrees per hour.....

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What is the minimum value of the objective function C = 4x + 9y?

Elodia [21]

Answer:-24

explain how you know:

Since xy = 4, we have y=4/x. Substituting in (1) we get f(x) = 4x+(36/x) …….(2)

Differentiating we get f ' (x) = 4 - (36/x^2)…..(2)

For maxima or minima, f ‘ (x) = 0

=> 4 - (36/x^2) =0 => (4x^2 - 36)/x^2 = 0 which gives x= +/- 3

Differentiating (2), f ‘’ (x) = 72/x^3

When x= +3 , f ‘’ (x) is clearly +ve. Therefore f(x) at (2) gives minima and the minimum value is 24.

When x= -3, f ‘’ (x) is -ve. Therefore, f(x) has maxima at x= -3. The maximum value is -24.

Note: You may be surprised to observe that the minima is more than the maxima. This is due to the fact that the function is discontinuous at x= 0, the graph of f(x) comprising of two branches, one in the first quadrant giving the minima (= +24) and another in the third quadrant that gives maxima (= -24)

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3 years ago

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A necklace is bought for $34 and sold for $38.25. show that the percentage profit is 12.5%

Goryan [66]

The answer is 38.25 thank me later

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3 years ago

In gfc factor 24-9 and 14x+63

icang [17]

Answer:

7(2x+9)

3(8-3)

Step-by-step explanation:

14x+63

We can factor out a 7

7(2x+9)

24-9

We can factor out a 3

3(8-3)

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3 years ago

The carpet for the office you completed cost $576. If you're using the same carpet in the new client's bedroom, how much will it

Temka [501]

Answer:

D. 225

Step-by-step explanation:

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3 years ago

Question 2(Multiple Choice Worth 1 points) (06.01) Solve 2x + 5y = −13 3x − 4y = −8 (4, 1) (−4, 1) (4, −1) (−4, −1)

dlinn [17]

ANSWER

The solution is
$(-4,-1)$

EXPLANATION

The given equations are:

$2x + 5y = - 13...(1)$

and

$3x - 4y = - 8...(2)$

We multiply equation 1 by 3 to get,

$6x + 15y = - 39...(3)$

We multiply equation 2 also by 2 to get,

$6x - 8y = - 16...(4)$

We subtract equation 4 from equation 3 to get,

$23y = - 23$
This implies that,

$y = - 1$

We put this value of y into any of the equations say equation 2

$3x - 4( - 1) = - 8$
Simplify

$3x + 4 = - 8$
Group like terms
$3x = - 8 - 4$
Simplify,

$3x = - 12$

Divide both sides by 3 to get,

$x = - 4$

Therefore the solution is
$(-4,-1)$

The correct answer is option D.

3 0

4 years ago