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3 years ago

Help i’m taking the test Find the value of x.

Mathematics

1 answer:

agasfer [191]3 years ago

3 0

X = 7

The angles are congruent so you’d do, 4x-5=23 and you’d get x = 7

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Which is an example of a statistical question?

ElenaW [278]

Answer:

3??

Step-by-step explanation:

im trying, sorry if its wrong :(

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3 years ago

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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

PLEASE HELP ME PLEASE HELP ME

Leya [2.2K]

A = bh

A = 5.4 x 3.8 = 20.52

20.52 x 4 = 82.08

So, the answer is 82.08 m^2

6 0

3 years ago

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HEEEELLLLPPPPPPPPP !!!!

Radda [10]

Answer:

Step-by-step explanation:

Common difference = 5

a₁ = 24

a₆ = a₁ + (6-1)5 = 49

7 0

3 years ago

Pls hurry!!!!!!!!!!!!!!!!!!!!!!!!!

Vsevolod [243]

Answer:

It's B.

Step-by-step explanation:

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3 years ago