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1 year ago

Can you help me by solving the following question ?

Mathematics

1 answer:

vredina [299]1 year ago

6 0

Answer:

there should be formula at last look carefully and see formula u will find it

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What is the value of y in the equation 4(5y − 8 − 2) = 185 − 15? 8. 5 9. 7 10. 5 42. 5.

Bezzdna [24]

Answer:

10.5 is the answer

Step-by-step explanation:

4(5y−8−2)=185−15

(4)(5y)+(4)(−8)+(4)(−2)=185+−15(Distribute)

20y+−32+−8=185+−15

(20y)+(−32+−8)=(185+−15)(Combine Like Terms)

20y+−40=170

20y−40=170

20y−40+40=170+40

20y=210

20y/20=210/20

y=21/2

y=10.5

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1 year ago

John asked 60 people to name their favourite fruit here are his results

LuckyWell [14K]

Pears 15-30
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2 years ago

A snail travels 5 meters in 20 minutes. He travels the same amount of time per meter. How long will it take him to travel 11 met

Llana [10]

Answer:

Step-by-step explanation:

20:5=4 (minutes for 1 meter)

4*11=44 minutes for 11 meters

20 : 5 = x : 11

x = 20*11:5

x = 44

20:5* 11=44

7 0

2 years ago

Can you guys please help me ?

Sonbull [250]

You have to divorce it

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2 years ago

Write the linear system of differential equations in matrix form then solve the system.

zvonat [6]

In matrix form, the system is

$\dfrac{\mathrm d}{\mathrm dt}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}1&1\\4&1\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}$

First find the eigenvalues of the coefficient matrix (call it $\mathbf A$ ).

$\det(\mathbf A-\lambda\mathbf I)=\begin{vmatrix}1-\lambda&1\\4&1-\lambda\end{vmatrix}=(1-\lambda)^2-4=0\implies\lambda^2-2\lambda-3=0$

$\implies\lambda_1=-1,\lambda_=3$

Find the corresponding eigenvector for each eigenvalue:

$\lambda_1=-1\implies(\mathbf A+\mathbf I)\vec\eta_1=\vec0\implies\begin{bmatrix}2&1\\4&2\end{bmatrix}\begin{bmatrix}\eta_{1,1}\\\eta_{1,2}\end{bmatrix}=\begin{bmatrix}0\\0\end{bmatrix}$

$\lambda_2=3\implies(\mathbf A-3\mathbf I)\vec\eta_2=\vec0\implies\begin{bmatrix}-2&1\\4&-2\end{bmatrix}\begin{bmatrix}\eta_{2,1}\\\eta_{2,2}\end{bmatrix}=\begin{bmatrix}0\\0\end{bmatrix}$