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alekssr [168]
3 years ago
11

Use the distributive property to rewrite this expression. 3(a + 6)

Mathematics
1 answer:
liq [111]3 years ago
6 0

Answer:

3a + 18

Step-by-step explanation:

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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.

__

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
2 years ago
What is the sun of the 9th square number and the 2nd square number?
scoray [572]

Answer:

85

Step-by-step explanation:

The 9 th square number is 9² = 81

The 2 nd square number is 2² = 4

sum = 81 + 4 = 85

3 0
3 years ago
aneesha travels at a rate of 50 miles per hour .Morris is taveling 3 feet per second less then aneesha .which is the best estima
Eddi Din [679]
3 feet per second is equivalent to 2.04545 miles per hour
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3 years ago
Please I need help <br><br>9x + 14 ≤ 95​
Wittaler [7]

<em><u>ANSWER</u></em>

My answer is in the photo above

7 0
3 years ago
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Answer:

A

Step-by-step explanation:

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