30x10-91x3-30 factorizar

Mathematics

1 answer:

Mrrafil [7]3 years ago

4 0

Answer:

(3x5 - 10) • (10x5 + 3)

Step-by-step explanation:

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|| evaluate. ||<br> m/ 2 for m = 8 <br> help asap plsplspls !! :)

blondinia [14]

Answer:

Step-by-step explanation:

8/2=4

4 0

3 years ago

A thermometer is taken from an inside room to the outside, where the air temperature is 20° f. after 1 minute the thermometer re

fomenos

The change in the temperature is proportional to the difference in temperatures. Let's call the initial temperature of the room and the thermometer $E_0$ and the current temperature $E(t)$ where $t$ is the elapsed time in minutes. The outside temperature is 20 F.

Newton's Law of Cooling:

$E(t) - 20 = (E_0 - 20) e^{- k t}$

We're given $E(1)=70 \textrm{ and } E(5)=45$

$70-20 = (E_0 - 20) e^{-k}$

$45-20 =(E_0 - 20) e^{-5k}$

Dividing,

$\dfrac{50}{25}=e^{4k}$

$k = \dfrac 1 4 \ln 2$

Now,

$E(t) - 20 = (E_0 - 20) e^{- k t}$

$E_0 = 20 + (E(t) - 20)e^{k t}$

$E_0 = 20 + (E(1) - 20)e^{k}$

$E_0 = 20 + (70 - 20)e^{\ln 2/4}$

$E_0 = 20 + 50 \cdot 2^{1/4} \approx 79.46 \textrm{ degrees F}$

3 0

4 years ago

Write a linear function f with the values f (0) =-1 and f (3)= -10

dmitriy555 [2]

Answer:

The linear function is $y = -3x -1$ .