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3 years ago

Rewrite the expression as an algebraic expression in x. cos(tan−1 x)

Mathematics

1 answer:

mariarad [96]3 years ago

3 0

1/(sqrt(1+x^2))..................

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A rectangular prism is made of 81 unit cubes. The prism is 9 unit cubes long.

dimaraw [331]

Answer:

A width: 3 unit cubes

height 3 unit cubes

Step-by-step explanation:

Volume of rectangular prism = 81 unit cubes

$l$ = Length of rectangular prism = 9 unit cubes

$w$ = Width of rectangular prism

$h$ = Height of rectangular prism

Volume of a rectangular prism is given by

$V=lwh\\\Rightarrow 81=9wh\\\Rightarrow wh=\dfrac{81}{9}\\\Rightarrow wh=9$

The product of width and height must be 9 so from the options this is only possible when width and height both are 3 units.

So, the width is 3 unit cubes and the height is 3 unit cubes.

4 0

3 years ago

Evaluate the power: (−3)^4 A. 81 B. -81 C. 243 D. -331

Agata [3.3K]

Answer:

The answer is 81.

Step-by-step explanation:

Since the power of 4 is even, the result will be positive.

${3}^{4}$

Simplify.

$81$

hence, the answer is Option A) 81.

7 0

3 years ago

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givi [52]

Junes is it a joke or not even a cheer leader for the last year of her and I can’t bc

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2 years ago

True or False

matrenka [14]

Answer:

for saken it is better to use ordinary calculator than cp because they have a big difference. That's all I can say

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3 years ago

-2°F ___ -6°F =? >? <?

yuradex [85]

Answer:

-2 °F > -6 °F

Step-by-step explanation:

-2 is to the right of -6 on the number line, so is the greater of the two values. The temperature has to go up from -6 to get to -2. Thus, ...

-2 °F > -6 °F

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3 years ago