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4 years ago

ANSWER 30 a and b PLEASE I REALLY NEED HELP! THANK YOU, BEST ANSWER GETS BRAINLIEST AS USUAL!

Mathematics

1 answer:

timofeeve [1]4 years ago

4 0

I'm a unicorn with a big horn

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Is (-3,2) a solution of 7x+9y>-3?

AVprozaik [17]

7(-3)+9(2)>-3
-21+18>-3
-3>-3

No

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3 years ago

The heat index I is a measure of how hot it feels when the relative humidity is H (as a percentage) and the actual air temperatu

PSYCHO15rus [73]

Answer:

a) $I(95,50) = 73.19$ degrees

b) $I_{T}(95,50) = -7.73$

Step-by-step explanation:

An approximate formula for the heat index that is valid for (T ,H) near (90, 40) is:

$I(T,H) = 45.33 + 0.6845T + 5.758H - 0.00365T^{2} - 0.1565TH + 0.001HT^{2}$

a) Calculate I at (T ,H) = (95, 50).

$I(95,50) = 45.33 + 0.6845*(95) + 5.758*(50) - 0.00365*(95)^{2} - 0.1565*95*50 + 0.001*50*95^{2} = 73.19$ degrees

(b) Which partial derivative tells us the increase in I per degree increase in T when (T ,H) = (95, 50)? Calculate this partial derivative.

This is the partial derivative of I in function of T, that is $I_{T}(T,H)$ . So

$I(T,H) = 45.33 + 0.6845T + 5.758H - 0.00365T^{2} - 0.1565TH + 0.001HT^{2}$

$I_{T}(T,H) = 0.6845 - 2*0.00365T - 0.1565H + 2*0.001H$

$I_{T}(95,50) = 0.6845 - 2*0.00365*(95) - 0.1565*(50) + 2*0.001(50) = -7.73$

8 0

3 years ago

Write the ratio as a fraction in simplest form.<br> 18<br> 84

Andrei [34K]

Answer:

3/14

Step-by-step explanation:

7 0

3 years ago

In Antarctica, the warmest month averages a temperature of -14F, which is 57 degrees warmer than its coldest month. What is the

alex41 [277]

Answer:

its 43

Step-by-step explanation:

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3 years ago

The price of a sandwich decreases from $8 to $6. What is the percentage decrease in the price of the sandwich?

bazaltina [42]

Answer:

It decreased by 25%

Step-by-step explanation:

8 x .25=2

8 - 2 = 6

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3 years ago