4 years ago

Factor this expression: 12 + 20

Mathematics

1 answer:

liberstina [14]4 years ago

5 0

Answer:

Step-by-step explanation:

12 = 4 × 3

20 = 4 × 5

12 + 20 = 4 × 3 + 4 × 5 = 4 × (3 + 5)

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What is 15 1/2 divided by 2 1/5

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3 years ago

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1/3 of a number decreased by 13 equals 45

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Answer:

174

Step-by-step explanation:

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3 years ago

Express each ratio to the lowest term 3:18, 8:10, 6:15, 9:12, 4:12?

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Answer:

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3 years ago

Can someone please help me with this? Thank you!

kkurt [141]

Answer:

$\left[\begin{array}{ccc}-25&\dfrac{75}{2}&-\dfrac{25}{2}\end{array}\right]$

Step-by-step explanation:

In the first equality

$5\times \left[\begin{array}{cc}-1&2\\4&8\end{array}\right] =\dfrac{2}{5}m\times \left[\begin{array}{cc}-1&2\\4&8\end{array}\right],$

the matrices in both parts are the saem. The equality will be true if the same matrices are multiplied by the same numbers, so

$5=\dfrac{2}{5}m\Rightarrow m=5\times \dfrac{5}{2}=\dfrac{25}{2}$

For the second equality

$(H+[1\ 4\ -2])+[3\ 2\ -6]=[-2\ 3\ -1]+([1\ 4\ -2]+[3\ 2\ -6]),$

if $H=[-2\ 3\ -1]$ , then this equality represents the assotiative property of matrix addition.

Hence,

$m\times H=\dfrac{25}{2}\times [-2\ 3\ -1]=\left[\begin{array}{ccc}-25&\dfrac{75}{2}&-\dfrac{25}{2}\end{array}\right]$

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Rex is searching for shoes and discovers that he has 25 pairs of shoes for every 15 pairs of socks he has 50 pairs of shoes how

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30, Rex has 30 socks. Just double it, not that hard

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4 years ago