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Ulleksa [173]
3 years ago
11

Another way to write (6+7)x

Mathematics
2 answers:
Fofino [41]3 years ago
4 0

Answer:

what that person said

Step-by-step explanation:

Blizzard [7]3 years ago
3 0

Answer:

13x

Step-by-step explanation:

you just have to add the six and the seven together and then add the x

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A pan of warm water (46∘ Celsius) was put in a refrigerator. After 15 minutes, the water's temperature was 27∘ C; 15 minutes aft
Cloud [144]

Answer:

The refrigerator was at around 13 ∘C

Step-by-step explanation:

Newton's Law of Cooling:

The rate of change of a body temperature  (amount of heat loss/time of loss) is directly proportional to the difference between its own temperature and the surroundings.

\frac{T(t2)-T(t1)}{t2-t1} = -h (T(t2) - Tenv)

T ⇒ temperature

t ⇒ time

Tenv ⇒refrigerator temperature

\frac{T(t2)-T(t1)}{t2-t1} ⇒ rate of change of he temperature

-h ⇒ constant of proportionality (negative because the temperature is decreasing inside the refrigerator)

We have 3 points:

time (minutes) - Temperature (∘ C)

0 (when the pan was put in the refrigerator) - 46

15 (after 15 minutes) - 27

30 (15 minutes after the first 15 minutes) - 19

\frac{27 - 46}{15 - 0} = -h (27 - Tenv)

\frac{19 - 27}{15 - 0} = -h (19 - Tenv)

Now we have a system of two equations and two variables

\frac{-19}{15} = -h (27 - Tenv)\\ \frac{19}{15} = h (27 - Tenv)\\ \frac{19}{15(27 - Tenv)} = h

\frac{19 - 27}{15 - 0} = -h (19 - Tenv)\\\frac{-8}{15} = -h (19 - Tenv)\\\frac{8}{15} = h (19 - Tenv)\\\frac{8}{15} = \frac{19}{15(27 - Tenv)} (19 - Tenv)\\8(27 - Tenv) = 19 (19 - Tenv)\\216 - 8 Tenv = 361 - 19 Tenv\\19 Tenv - 8 Tenv = 361 - 216\\11 Tenv = 145 \\Tenv = 145/ 11\\Tenv = 13. 18

The refrigerator was at around 13 ∘C

6 0
3 years ago
HOW DO I FIND THE SLOPE OF A LINE PERPENDICULAR TO EACH GIVEN LINE???
Paul [167]

Answer:

Slope intercept formula is Y=MX +B

Step-by-step explanation:

so all you need to do is put the equation in that Form

THE SLOPE WOULD BE -8

5 0
2 years ago
Which of the following have the same value as the fraction below? 3/8
Digiron [165]
1/2,2/4,3/8 and 6/16 could i plz get a brainly i just need one 
5 0
3 years ago
39.39÷3 Show ur work plz
kiruha [24]

Answer:

13.13

Step-by-step explanation:

39.39 ÷ 3

13.13

There is not a lot of work

Looking at it we can tell that 3 will go into 3 one time, and 3 will go into 9 three times because:

1 x 3 = 3

3 x 3 = 9

3 0
3 years ago
Read 2 more answers
What is the gfc of 16 and 8​
lesantik [10]

Answer:

<h2>Greatest common factor of 16 and 8 is 8 .....</h2>
6 0
3 years ago
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