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coldgirl [10]
2 years ago
6

Suppose you make coffee and it starts off just too hot to drink, so you put it in the refrigerator temporarily to cool it off. I

f the original temperature is 190 degrees Fahrenheit and the refrigerator is 36 degrees Fahrenheit, what will the temperature of the coffee be after 3 minutes? (k = 0.12)
Mathematics
1 answer:
Alex2 years ago
5 0

Answer:

Step-by-step explanation:

f(x)= 36( 1 - 0.12)^x. F(x)= 36(0.88)^3. f(x)= 95.04    190-95.05 = 94.95 degree.

Because the temperature is going down, we will use (1-0.12) instead of (1+0.12). X=3 because it is what temperature after 3 min. x= time.

I don't understand the question that well, but please don't report me. I will fix it if I can.

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Four times the sum of a number and 15 is at least 120. Find all possible solutions for x
zloy xaker [14]
First translate the English phrase "Four times the sum of a number and 15 is at least 120" into a mathematical inequality.

"Four times..." means we're multiplying something by 4.

"... the sum of a number and 15..." means we're adding an unknown and 15 and then multiplying the result by 4.

"... is at least 120" means when we substitute the unknown for a value, in order for that value to be in the solution set, it can only be less than or equal to 120.

So, the resulting inequality is 4(x + 15) ≤ 120.

Simplify the inequality.

4(x + 15) ≤ 120
4x + 60 ≤ 120 <-- Using the distributive property
4x ≤ 60 <-- Subtract both sides by 60
x ≤ 15 <-- Divide both sides by 4

Now that we have the inequality in a simplified form, we can easily see that in order to be in the solution set, the variable x can be no bigger than 15.

In interval notation it would look something like this:

[15, ∞)

In set builder notation it would look something like this:

{x | x ∈ R, x ≤ 15}

It is read as "the set of all x, such that x is a member of the real numbers and x is less than or equal to 15".
7 0
3 years ago
What is (5,2) and (2,8) in slope intersect form?
yaroslaw [1]

Answer:

-3,6

Step-by-step explanation:

i think this is right

6 0
3 years ago
Write the equation of the line in slope-intercept form
NikAS [45]

Answer: Y = 7/8x+ 2.25

Step-by-step explanation:

  • you would subtract both y  7
  • subtract both x    -8
  • y=7/8x+b
  • 3= 7/8 x-2 +b
  • 3     = 1.75 + b
  • -1.75           -1.75
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8 0
3 years ago
Someone h e l p me on this it is geometry
ladessa [460]

BC = 6 km

<u>/</u><u> </u> ACB = 34°

AC = ?

cos 34° = \frac{BC}{AC}

=> 0.829 = \frac{6}{AC}

=> AC = \frac{6}{0.829}

=> AC = 7.23763570567

=> AC = 7 km

=> AC = 10 km\:\:\:\:\:\:\:\: (nearest tenth)

\\

<h3>Answer : 10 km</h3>

\\\\\\\\

HOPE IT HELPS

PLEASE MARK ME BRAINLIEST ☺️

7 0
3 years ago
5.3 liters to milliters​
Dominik [7]

Answer:

5300 milliliters​

Step-by-step explanation:

7 0
2 years ago
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