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crimeas [40]
3 years ago
12

What are the answer to this question

Mathematics
2 answers:
IrinaK [193]3 years ago
7 0

Answer: t=-3h+25

Step-by-step explanation:

t=-3h+25

25 degrees is a constant-- it never changes, no matter how many hours goes by. So, you don't multiply a variable with it.

The temperature drops every 3 hours-- this is not constant, since it's dependent on the number of hours that passes. So, use a variable here. Since the temperature drops every three hours, it's -3, and not 3.

padilas [110]3 years ago
3 0

Answer:

t=-3h+25

Step-by-step explanation:

If we know that when h=0, t=25, then we can use a direct proportion equation (x=ky). The temperature decreases every hour by 3 degrees. However, we know that before any temperature drop, the temperature was 25 degrees. All together, this gives us t=-3h+25, where -3h is the temperature drop each hour, and 25 is the starting temperature. Hope that explained things :)

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A triangle has two sides measuring 16 and 21. The included angle is 116°. What is the length of the side opposite the 116° angle
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Answer: A. 31.5

Step-by-step explanation:

Using law of cosine because it is side angle side

a=16

b=21

angle = 116

c^2=a^2+b^2-2ab cosC, let C be the angle given

c^2=(21)^2+(16)^2-2(16)(21) cos(116)

c^2=441+256-672 cos(116)

i used a ti-89 and answered the right side and got

(you can find a ti-89 simulator online, but for problems like this make sure it is in degree mode)

991.585

c^2=991.585

take square root of both sides

=31.4894, which if you round it up it would be 31.5, so the answer would be A

therefore:

a=16

b=21

c=31.5

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