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Brut [27]
2 years ago
15

I dont know what answer is i need help

Mathematics
2 answers:
Llana [10]2 years ago
8 0

Answer:

12

Step-by-step explanation:

Let's look at the following exponent rule below:

\frac{x^{a} }{x^{b} } = x^{a-b}

We can apply this rule to the problem given to help us find the final answer by taking each exponent and <em>subtracting them</em>. Let's illustrate this below:

\frac{12^{-4} }{12^{-5} } =12x^{-4-(-5)}=12^{-4+5} =12^{1} =12

Hopefully this was helpful! Let me know if you have any more questions.

Otrada [13]2 years ago
3 0
Its 12. -4 - -5 = 1. 12^1 =12
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If a pine tree grows 4 inches per year, how long will it take for the tree to reach a height of 13 feet?
attashe74 [19]

Answer:

Should be 39 years.

there is 12 inches in a foot. and if the tree grows 4 inches every year, then in 3 years the tree would be 1 foot. 13 x 3 = 39, thus proving that in 39 years, it will be 13 feet tall. I may be wrong but this sounds correct.

5 0
3 years ago
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+{-x2y+[-(x2y-2xy2+y2)+(-xy2-3y2+x2y)]-(10y2-x2y)}
Kay [80]

Answer:

3xy² -  14y²      

Step-by-step explanation:

I hope that this is the problem

   - x²y + [ - (x²y - 2xy² + y²) + (xy² - 3y² + x²y)] - (10y² - x²y)

= - x²y + [ - x²y + 2xy² - y² + xy² - 3y² + x²y] - 10y² + x²y

Now combine like terms in the [  ].

= - x²y  + [ -x²y + x²y + 2xy² + xy² - y² - 3y² ] - 10y² + x²y

= - x²y  + [ 0 + 3xy² - 4y²] - 10y² + x²y

= - x²y + 3xy² - 4y² -10y² + x²y                      Now combine like terms

=   (-x²y + x²y) + 3xy² + (-4y² - 10y²)

=       0 + 3xy² - 14y²

=  3xy² -  14y²       or    y²(3x - 14)

6 0
2 years ago
Juanita is cutting a piece of construction paper in the shape of a parallelogram. Two opposite sides of the parallelogram have l
Tema [17]

Answer:

4 cm and 7 cm

Step-by-step explanation:

Given that Juanita is cutting a piece of construction paper in the shape of a parallelogram. Two opposite sides of the parallelogram have lengths (5n − 6) cm and (3n − 2) cm.

We know that opposite sides are equal in a parallelogram.

Hence we have

5n-6 = 3n-2\\2n =4\\n=2

Hence the side length = 5(2)-6 =4 cm

The adjacent side = 2n+3\\=2(2)+3\\=7cm

Thus answer is 4 cm and 7 cm

3 0
3 years ago
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masya89 [10]

Answer:

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(

x

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=

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,  

g

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=

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x

2

+

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x

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4

 

(

f

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(

x

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f

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x

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+

2

x

−

4

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f

(

x

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+

g

(

x

)

by replacing the function designators with the actual functions.

x

4

−

3

+

(

4

x

2

+

2

x

−

4

)

Simplify.

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4

x

2

+

9

x

4

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