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2 years ago

Tell whether the given equation has the ordered pair as a solution. y=-x -2;(2,-4)

Mathematics

2 answers:

motikmotik2 years ago

4 0

Yes the given equation has the offered pair as a solution

Sophie [7]2 years ago

4 0

Yes, the order pair is a solution

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A blueprint for a building includes a rectangular room that measures 3 inches long and 7.5 inches wide The scale for the bluepri

azamat

3 · 7.5 = 22.5: 22.5 is the area of the building on the blueprint in inches

22.5 · 10 = 225 feet squared is the area of the building in real life.

hope this helped!

6 0

2 years ago

If hoan was asked to drow a right angke how miny right agnkes are in a right angle

krek1111 [17]

I might not understand this correctly because of the misspellings, but if you draw a right angle. There is only 1 right angle... in a right angle.

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3 years ago

if you were to solve the following system by substitution, what would be the best variable to solve for and from what equation?

Romashka-Z-Leto [24]

Answer:

see below

Step-by-step explanation:

2x+8y=12 3x-8y=11

If we have to solve by substitution, Take the first equation and divide by 2

2x/2 + 8y/2 =12/2

x+4y = 6

Then subtract 4y from each side

x = 6 -4y

Then substitute this into the second equation

This is best solved by elimination

2x+8y=12

3x-8y=11

----------------

5x = 36

x = 36/5

6 0

2 years ago

Get moneyy. Answer this.

Alexxandr [17]

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5 0

2 years ago

Read 2 more answers

(1 point) Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference betw

slavikrds [6]

Answer:

a. $\frac{dT}{dt}=k(T-Tm); T(0)=190$

b. $C_{0}=122$

c. $k=-0.00259$

d. $t=153.39838\\$ minutos

Step-by-step explanation:

a. Newton's law of cooling states that the speed with which a body is cooled is proportional to the difference between its temperature and that of the medium in which it is found. Then, the initial value problem is given by:

$Tm=68$

$\frac{dT}{dt}=k(T-Tm); T(0)=190$

b. The differential equation obtained is a differential equation of separable variables:

$\frac{dT}{T-Tm}=kdt\\\\\int {\frac{dT}{T-Tm}}=\int{kdt}\\\\Ln|T-Tm|=kt+C\\\\T(t)=C_{0}e^{kt}+Tm=C_{0}e^{kt}+68\\\\T(0)=C_{0}e^{k(0)}+68=190\\\\C_{0}=122$

c. After 33 minutes of serving the coffee has cooled to 180°:

$T(33)=122e^{33k}+68=180\\\\e^{33k}=\frac{112}{122}\\\\33k=Ln(\frac{112}{122})\\\\k=-0.00259$

$150=122e^{-0.00259t}+68\\\\Ln(\frac{150-68}{122})=-0.00259t\\\\t=153.39838\\\\$

8 0

3 years ago