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Sergio [31]
3 years ago
14

Please help marking brainlist

Mathematics
2 answers:
Paul [167]3 years ago
7 0

Answer:

-3

Step-by-step explanation:

-3 times 3 equals -9

bekas [8.4K]3 years ago
4 0

Answer:

-3

Step-by-step explanation:

-9/3=-3

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The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min
denis23 [38]

Answer:

  (b)  67

Step-by-step explanation:

A solution to the differential equation describing the temperature according to Newton's Law of Cooling could be written as ...

  T = (final temp) + (initial difference)×(decay factor)^t

where the decay factor is the fraction of change during 1 unit of time period t.

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Here, the initial difference of 100-25 = 75 degrees decays to 90-25 = 65 degrees in 1 minute. So, the units of t are minutes, the decay factor is 65/75, the initial difference is 75 degrees, and the final temperature is 25 degrees. That lets us write the equation as ...

  T = 25 +75(65/75)^t

Then for t=4, the temperature is ...

  T = 25 +75(13/15)^4 ≈ 67.3 . . . . degrees

After 4 minutes the temperature of the coffee is about 67 degrees.

4 0
1 year ago
Please write a equation for this line
Eduardwww [97]

Answer:

y=-x

Step-by-step explanation:

It's going left one by one, meaning the slope is negative and has a slope of -1 or -x.

3 0
2 years ago
Which point is NOT on the line y = 2x + 3?
yaroslaw [1]

Answer:

i thinks the answer of that is letter A

5 0
3 years ago
Read 2 more answers
3. A game console originally is priced at $120. Demand increases the cost by 75%. What is the new price? Show your work ​
morpeh [17]

Answer:

New price = $210

Step-by-step explanation:

Given:

Original price = $120

Increase in cost = 75%

Find:

New price

Computation:

New price = Original price + Increase in cost

New price = 120 + 120(75%)

New price = 120 + 90

New price = $210

8 0
3 years ago
Freeeeee point because i said so ughh
lana [24]

Answer:

thanks bro

Step-by-step explanation:

5 0
2 years ago
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