All categories

3 years ago

The temperature of a mixture is decreasing by 5∘C every hour. When it was first mixed, its temperature was recorded at −20∘C.

Mathematics

2 answers:

Mandarinka [93]3 years ago

7 0

Answer:

f(x)=−5x−20

Step-by-step explanation:

It's decreasing 5 degrees every hour, which is represented by -5x

You also have to take away the 20 (-20) from where it started.

So, f(x)=−5x−20

xeze [42]3 years ago

5 0

Answer:

f(x) = -5x - 20

Step-by-step explanation:

f(x) = starting temperature + decreasing temperature * number of hours

= -20 + (-5) * x

= -20 - 5x

You might be interested in

Help giving brainly if correct show work to get full points

prohojiy [21]

Answer:

Step-by-step explanation:

This is an geometric series.

Common ratio = second number÷ first number

$= \dfrac{4096}{-1024} = -4$

To get the next number, 256 should be divide by (-4)

$\dfrac{256}{(-4)}= -64 \\\\\\\dfrac{-64}{-4}=16\\\\\\\dfrac{16}{-4}=-4$

The three numbers are : -64 , 16 , -4

6 0

2 years ago

Which of the sums below can be expressed as 7(4 9)? 28 9 28 637 6311 16?

Kay [80]

Can you go deeper into the question?

3 0

2 years ago

Find the measure of angle ABC

victus00 [196]

First we need to find x so 6x+8x+6x= 180
20x=180 and x= 9

So A= 6*9= 54
B= 8*9= 72
C= 6*9= 54

5 0

2 years ago

Kelly bought a book of 20 stamps. She has used 80% of them. A. How many stamps has Kelly used? B. How many stamps does she have

jok3333 [9.3K]

80% of 20 is 80/100 x 20 = 16

So, kelly has used 16 stamps, and has 4 left

4 0

2 years ago

Read 2 more answers

A city's population is currently 500,000. If the population doubles every 65 years, what will the population be 130 years from n

kompoz [17]

Answer:

2,000,000

Step-by-step explanation:

Simple maths, really.

65 times 2 is 130, and the population is already 500,000 with no time passing. 65 years later, the population would be 1,000,000. 65 years after that, the population would double again, so the answer would be 2 million.

Hope this helped!

5 0

3 years ago