3 years ago

Someone help me please

Mathematics

1 answer:

Bond [772]3 years ago

6 0

Answer:

Step-by-step explanation:

Plug in the standard deviation formula. This is new to me but it took some research.. Hope it helps

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Two addends

nataly862011 [7]

Answer:

Step-by-step explanation:

18+6+4=28

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3 years ago

Elena’s aunt bought her a $150 savings bond when she was born. When Elena is 20 years old, the bond will have earned interest an

Ghella [55]

Answer:

307.5$

Step-by-step explanation:

150$. 105% of it added.

Since 105% is 1.05, multiply the percentage by the cost to get the money added.

150*1.05=157.5

Then ADD it to the price/savings.

150+157.5=307.5$

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3 years ago

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Multiply 3x(2x-1) by following these steps

siniylev [52]

Answer:

6x^2-3x

Step-by-step explanation:

$3x(2x-1)= \\\\3x(2x)-3x(1)= \\\\6x^2-3x$

Hope this helps!

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3 years ago

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bagirrra123 [75]

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3 years ago

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A library building is in the shape of a rectangle. Its floor has a length of (3x + 5) meters and a width of (5x − 1) meters. The

malfutka [58]

We can use the Front Outside Inside Last (FOIL) method to expand the double bracket

$(3x+5)(5x-1)$

Front ⇒ $(3x)(5x)=15 x^{2}$
Outside ⇒ $(3x)(-1)=-3x$
Inside ⇒ $(5)(5x)=25x$
Last ⇒ $(5)(-1)=-5$

Put the four terms together we have
$15 x^{2} -3x+25x-5$ , then collect like terms
$15 x^{2} +22x-5$

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3 years ago

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