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3 years ago

Estimate 3437+6391 by first rounding each number to the nearest thousands

Mathematics

2 answers:

Olegator [25]3 years ago

8 0

Answer:

9000

Step-by-step explanation:

rounding to the nearest thousand means rounding by the hundredths digit.

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3437 rounds down to 3000,

^ the four is less than 5, so it rounds down.

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6391 rounds to 6000

^ the three is less than 5, so it rounds down

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3000+6000= 9000

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Hope this helps!

valentina_108 [34]3 years ago

5 0

Answer:

9000

Step-by-step explanation:

3437 rounds to 3000 and 6391 rounds to 6000 add them

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Use matrix addition to solve this equation: B + 15 −7 4 0 1 2 = 1 2 12 4 0 2 b11 = b12 = b13 = b21 = 4 b22 = −1 b23 = 0

Arada [10]

Answer:

$b_{11}=-14,b_{12}=9,b_{13}=8,b_{21}=4,b_{22}=-1,b_{23}=0$

Step-by-step explanation:

The given matrix addition is

$B+\begin{bmatrix}15&-7&4\\ 0&1&2\end{bmatrix}=\begin{bmatrix}1&2&12\\ 4&0&2\end{bmatrix}$

We need to find the elements of matrix B.

Let $B=\begin{bmatrix}b_{11}&b_{12}&b_{13}\\ b_{21}&b_{22}&b_{23}\end{bmatrix}$

Substitute the value of matrix.

$\begin{bmatrix}b_{11}&b_{12}&b_{13}\\ b_{21}&b_{22}&b_{23}\end{bmatrix}+\begin{bmatrix}15&-7&4\\ 0&1&2\end{bmatrix}=\begin{bmatrix}1&2&12\\ 4&0&2\end{bmatrix}$

After addition of two matrix we get

$\begin{bmatrix}b_{11}+15&b_{12}-7&b_{13}+4\\ b_{21}+0&b_{22}+1&b_{23}+2\end{bmatrix}=\begin{bmatrix}1&2&12\\ 4&0&2\end{bmatrix}$

On equating both sides.

$b_{11}+15=1\Rightarrow b_{11}=-14$

$b_{12}-7=2\Rightarrow b_{12}=9$

$b_{13}+4=12\Rightarrow b_{13}=8$

$b_{21}+0=4\Rightarrow b_{21}=4$

$b_{22}+1=0\Rightarrow b_{22}=-1$

$b_{23}+2=2\Rightarrow b_{23}=0$

Therefore, the elements of matrix B are $b_{11}=-14,b_{12}=9,b_{13}=8,b_{21}=4,b_{22}=-1,b_{23}=0$ .

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3 years ago

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Step-by-step explanation:

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2 years ago

A scale model of a tower is 24 inches tall and 18 inches wide. If the height of the actual tower is 60 feet, what is its width?

alex41 [277]

Answer:

45 feet

Step-by-step explanation:

To find the width of the model, we need to find the scale of the model to the actual tower.

Since we know the height of both towers, we can use that as the basis.

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6 inches : 15 feet

So the width of the tower is 18 inches wide.

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3 years ago

What percent of 100.9 is 82??

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Answer:

81%

Step-by-step explanation:

$82/100.9=0.81\\0.81*100=81%$

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2 years ago

Estimate 3437+6391 by first rounding each number to the nearest thousands​

Estimate 3437+6391 by first rounding each number to the nearest thousands