3 years ago

Due tomorrow work is appreciated but not required

Mathematics

1 answer:

DerKrebs [107]3 years ago

8 0

Number 1 is A.
Number 6 is C.

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Tony is 21 years older than his sister Danielle. In 13 years he will be twice as old as Danielle. How old is each of them now?

Bess [88]

x-y=21 ⇒ x=y+21

x+13=2y

Substitute y+21 for x into the equation x+13=2y

So y+21+13=2y

Simplify 34=y

So Danielle is 34 years old. Plug y back in to the original equation

x-34=21

x=55

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4 years ago

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olganol [36]

Answer:

Option B. $192\ units^{3}$

Step-by-step explanation:

we know that

The volume of the square pyramid is equal to

$V=\frac{1}{3}b^{2}H$

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H is the height of the pyramid

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$H=9\ units$

substitute

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i believe the other side is the 50 or 60 in length

Step-by-step explanation:

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Pavlova-9 [17]

Answer:

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600\div 25

600÷25

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Step-by-step explanation:

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3 years ago

Due tomorrow *work is appreciated but not required*

Due tomorrow work is appreciated but not required