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3 years ago

Write an algebraic expression for each verbal description. a number

Mathematics

1 answer:

Romashka [77]3 years ago

4 0

I believe it may be written like this:
.3g+25f

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3. The sum of the interior angle of a triangle is____.

SVEN [57.7K]

3. 180°

4. square

5. concave

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3 years ago

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The price of a video game increases by 20%, then decreases by 10%. If the final price is $46.98,

Elena-2011 [213]

Answer:

The original price was $43.50

Step-by-step explanation:

Let

x ----> the original price of a video game

we know that

1) The price of a video game increases by 20%

$100\%+20\%=120\%=120/100=1.20$

The final price is equal to the original price multiplied by 1.20

$1.20x$

2) The price of a video game decreases by 10%

$100\%-10\%=90\%=90/100=0.90$

The final price is equal to the price at this moment multiplied by 0.90

$0.90(1.20x)=1.08x$

we have that

$1.08x=46.98$

solve for x

$x=46.98/1.08\\x=\$43.50$

4 0

3 years ago

A cube with 3-inch edges is to be constructed from 27 smaller cubes with 1-inch edges. Twenty-one of the cubes are colored red a

Diano4ka-milaya [45]

The volume of the larger cube is 3*3*3, which is 27.
The volume of the smaller cubes is 1*1*1, which is 1.
27/1=27
That means all cubes will be used, so only the placement of the cubes matter.
The center of the cube will show no sides,
The center of the face will show 1 side, which has a surface area of 1sq.in.
Since there are 6 white cubes and 6 faces with 6 face centers, and only one cube center, there will be 5 cubes on the center of the faces and 1 in the cube center.

This means there will be 0 faces of 1 cube and 1 faces shown for the rest of the cubes. Since each face is 1sq.un., the rest is math

(0*1)+((1*1)5)
(0)+(1*5)
0+5
5sq.un. of the cube is white.

a=The fraction of surface area showing
b=Surface area of large cube

b=3*3*number of sides on cube(6)

5*a=b
5*a=54
a=54/5

Your answer is 54/5.

5 0

3 years ago

Why are exponents used in mathematics? Please help!! 10 points!!

Oksi-84 [34.3K]

Hi There!

Exponents are used in math so its easier to multiply. For example if you have to do 8 * 8 * 8 * 8 * 8 * 8 * 8 * 8, then to make it easier to multiply you could change into the exponent form $8^{8}$ that is what exponents are used for in math

Hope This Helps :)

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4 years ago

The mapping diagram shows a functional relationship. A mapping diagram shows a relation, using arrows, between domain and range

Setler [38]

Answer:

( 3, negative 1) I think.

Step-by-step explanation:

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3 years ago

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