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kogti [31]
3 years ago
5

Need help due wednesday will give brainliest for correct answer

Mathematics
1 answer:
Tems11 [23]3 years ago
6 0

Answer:

the answer is d

Step-by-step explanation:

the power can't be a negative if it's a speed

and it is km/hr

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Two states of matter are described below. State A: Changes shape and volume State B: Changes shape but not volume Which combinat
Mrac [35]

Answer:

State A = oxygen; State B = juice

Option 3

Step-by-step explanation:

Given:

State A: Changes shape and volume

State B: Changes shape but not volume

Multiple Choice options:

State A = juice; State B = block of wood

State A = hydrogen; State B = block of wood

State A = oxygen; State B = juice

State A = air; State B = neon

The three states of matter are

Solid - Does not change shape or volume (like ice)

Liquid - Changes shape but not volume (like water)

Gas - Changes shape and volume (like water vapour in air)

State A must be a gas.

State B must be a liquid.

Eliminate the choice where state A is not a gas.

XState A = juice; State B = block of wood

    Juice is a liquid, like water.

State A = hydrogen; State B = block of wood

State A = oxygen; State B = juice

State A = air; State B = neon

Find the choice where state B is a liquid.

State A = hydrogen; State B = block of wood

Correct State A = oxygen; State B = juice

State A = air; State B = neon

Incorrect State B:

Block of wood - solid

Neon - gas

3 0
3 years ago
Consider the system of differential equations dxdt=−4ydydt=−4x. Convert this system to a second order differential equation in y
koban [17]

\dfrac{\mathrm dy}{\mathrm dt}=-4x\implies x=-\dfrac14\dfrac{\mathrm dy}{\mathrm dt}\implies\dfrac{\mathrm dx}{\mathrm dt}=-\dfrac14\dfrac{\mathrm d^2y}{\mathrm dt^2}

Substituting this into the other ODE gives

-\dfrac14\dfrac{\mathrm d^2y}{\mathrm dt^2}=-4y\implies y''-16y=0

Since x(t)=-\dfrac14y'(t), it follows that x(0)=-\dfrac14y'(0)=4\implies y'(0)=-16. The ODE in y has characteristic equation

r^2-16=0

with roots r=\pm4, admitting the characteristic solution

y_c=C_1e^{4t}+C_2e^{-4t}

From the initial conditions we get

y(0)=5\implies 5=C_1+C_2

y'(0)=16\implies-16=4C_1-4C_2

\implies C_1=\dfrac12,C_2=\dfrac92

So we have

\boxed{y(t)=\dfrac12e^{4t}+\dfrac92e^{-4t}}

Take the derivative and multiply it by -1/4 to get the solution for x(t):

-\dfrac14y'(t)=\boxed{x(t)=-\dfrac12e^{4t}+\dfrac92e^{-4t}}

7 0
4 years ago
CONSTRUCTION The area of Liberty Township’s square playground is represented by the trinomial x^2 - 10x + 25. Write an expressio
Phoenix [80]

Answer:

X=5 and X=5

Step-by-step explanation:

X²-10x+25=0

X²-5x-5x+25=0

X(x-5)-5(x-5)=0

(X-5) (x-5)=0

X-5=0. x-5=0

X=5. x=5

4 0
3 years ago
What is the determinant of the coefficient matrix of the system?<br> –158<br> –117<br> 65<br> 117
tatuchka [14]

Answer:

C

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
-11 2/3 times (-4 1/5)
Julli [10]

Answer:49

Step-by-step explanation:

Converting each to an improper fraction,

-35/3 * -21/5 = 735/15 = 49

3 0
4 years ago
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