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3 years ago

Valentina has a tray where she keeps all of her important papers. The tray is in the shape of a rectangular prism with no top.

Mathematics

2 answers:

yulyashka [42]3 years ago

4 0

The answer is 300 as 2.5x10x12=300

Zinaida [17]3 years ago

3 0

Answer:

D.300

Step-by-step explanation:

did it on a test.

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McKenzie has her two books including 12 books by her favorite author. Express as a decimal the number of books by her favorite a

lisov135 [29]

Answer:

0.1666666666666666666666666....

The decimal is repeating because it goes on forever and never ends.

Step-by-step explanation:

4 0

3 years ago

Step by step how to solve ? 16x^2-10.3x+10=

Stella [2.4K]

Answer:

it is not possible result is not given so it is not possible

8 0

3 years ago

What is the length of BC , rounded to the nearest tenth?

Arte-miy333 [17]

Step $1$

In the right triangle ADB

Find the length of the segment AB

Applying the Pythagorean Theorem

$AB^{2} =AD^{2}+BD^{2}$

we have

$AD=5\ units\\BD=12\ units$

substitute the values

$AB^{2}=5^{2}+12^{2}$

$AB^{2}=169$

$AB=13\ units$

Step $2$

In the right triangle ADB

Find the cosine of the angle BAD

we know that

$cos(BAD)=\frac{adjacent\ side }{hypotenuse}=\frac{AD}{AB}=\frac{5}{13}$

Step $3$

In the right triangle ABC

Find the length of the segment AC

we know that

$cos(BAC)=cos (BAD)=\frac{5}{13}$

$cos(BAC)=\frac{adjacent\ side }{hypotenuse}=\frac{AB}{AC}$

$\frac{5}{13}=\frac{AB}{AC}$

$\frac{5}{13}=\frac{13}{AC}$

solve for AC

$AC=(13*13)/5=33.8\ units$

Step $4$

Find the length of the segment DC

we know that

$DC=AC-AD$

we have

$AC=33.8\ units$

$AD=5\ units$

substitute the values

$DC=33.8\ units-5\ units$

$DC=28.8\ units$

Step $5$

Find the length of the segment BC

In the right triangle BDC

Applying the Pythagorean Theorem

$BC^{2} =BD^{2}+DC^{2}$

we have

$BD=12\ units\\DC=28.8\ units$

substitute the values

$BC^{2}=12^{2}+28.8^{2}$

$BC^{2}=973.44$

$BC=31.2\ units$

therefore

the answer is

$BC=31.2\ units$

8 0

3 years ago

Read 2 more answers

What are the solutions of the quadratic equation?

Oliga [24]

Answer:

d)X=4 or x=-2

Step-by-step explanation:

X²-2x=8

X²-2x-8=0

(x-4)(x+2)=0

X-4=0 or x+2=0

X=4 or x=-2

4 0

2 years ago

Read 2 more answers

Is 90° an acute angle, right angle, obtuse angle, or straight angle?

VashaNatasha [74]

Answer:

90 degrees is a right angle.

Step-by-step explanation:

^ That would be a 90 degrees angle.

|____

|___|____________

Imagine this is a graph, that little square of the right would represent 90 degrees.

Angles less than 90 are acute angles, angles over 90 but under 180 degrees would be obtuse, and angles that are equal to 180 degrees are straight.

6 0

3 years ago

Read 2 more answers