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3 years ago

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Three inches of snow fell on Monday. Five inches of snow fell on Tuesday. One-half inch of snow fell on Wednesday. How much snow

fell during these three days? Show your work in the space below. Don't forget to label the units on your answer.

1 answer:

stiv31 [10]3 years ago

3 0

Answer:

9 and a half

Step-by-step explanation:

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Kamila [148]

The answer is:
Solve for y in the first equation
y=−5<span>
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2 years ago

Find the values of x, y, and λ that satisfy the system of equations. Such systems arise in certain problems of calculus, and λ i

Nimfa-mama [501]

Answer:

x=4, y=4, λ=-16

Step-by-step explanation:

We have this 3x3 system of linear equations:

$4x+$ λ $=0$

$4y+$ λ $=0$

$x+y=8$

So, let's rewrite the system in its augmented matrix form

$\left[\begin{array}{cccc}4&0&1&0\\0&4&1&0\\1&1&0&8\end{array}\right]$

Let´s apply row reduction process to its associated augmented matrix:

Swap R1 and R3

$\left[\begin{array}{cccc}1&1&0&8\\0&4&1&0\\4&0&1&0\end{array}\right]$

R3-4R1

$\left[\begin{array}{cccc}1&1&0&8\\0&4&1&0\\0&-4&1&-32\end{array}\right]$

R3+R2

$\left[\begin{array}{cccc}1&1&0&8\\0&4&1&0\\0&0&2&-32\end{array}\right]$

Now we have a simplified system:

x+y+0=0

0+4y+λ=0

0+0+2λ=-32

Solving for λ, x, and y

λ=-16

x=4

y=4

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Answer:

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Step-by-step explanation:

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