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Bond [772]
3 years ago
11

The floor tiles come in red, blue, and black. There are 16 red, 5 blue, and. 4 black. What percent of the tiles are black?

Mathematics
1 answer:
alexandr402 [8]3 years ago
4 0

16 % of tiles are black

<em><u>Solution:</u></em>

Given that floor tiles come in red, blue, and black

To find: percent of the tiles that are black

From given question,

number of red tiles = 16

number of blue tiles = 5

number of black tiles = 4

Therefore, total number of tiles = number of red tiles + number of blue tiles + number of black tiles

\rightarrow 16 + 5 + 4 = 25

Thus total number of tiles = 25

<em><u>To percent of the tiles that are black, use the following formula:</u></em>

\text{ percent black} = \frac{\text{ number of black tiles }}{\text{ total number of tiles }} \times 100

\rightarrow \frac{4}{25} \times 100\\\\\rightarrow 4 \times 4 = 16

Thus 16 % of tiles are black

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The seventh-grade class is putting on a variety show to raise money. It cost $700 to rent the banquet hall that they are going t
Natali5045456 [20]

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B) At least 114 tickets

C) As the attached graph

Step-by-step explanation:

The 7th grade class is putting on a variety show to raise money.

It cost $700 to rent the banquet hall that they are going to use.

If they charge $15 for each ticket,

We are to find how many tickets they need to sell in order to raise at least $1000.

Let the number of tickets they need to sell be t.

The inequality that represents this situation is;

$15t - $700 ≥ $1000

The least number of tickets they can sell is;

$15t ≥ $1000 + $700

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3 0
3 years ago
WILL GIVE MEDAL!!! I NEED ANSWER ASAP!!! Lukalu is rappelling off a cliff. The parametric equations that describe her horizontal
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The horizontal function is x(t) = 8·t
The vertical function is y(t) = -16·t² + 100

A) The answer is: it takes her 2.62 time units to reach the ground.

The time taken to move horizontally is equal to the time taken to move vertically from the cliff to the ground, therefore, we can set:
8·t = -16·t² + 100

and solve for t:
16·t² + 8·t - 100 = 0
4(4·t² + 2·t - 25) = 0
4·t² + 2·t - 25 = 0

t_{1,2} =  \frac{- \frac{b}{2} \pm  \sqrt{(\frac{b}{2})^{2} - ac } }{a}
t_{1,2} = \frac{- \frac{2}{2} \pm \sqrt{(\frac{2}{2})^{2} - (4)(-25) } }{4}

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t₂ = (-1 - √101) / 4 = - 2.76

We cannot accept negative times, therefore the solution is t = 2.62 time-units.

B) The answer is: she lands 20.96 distance-units from the cliff.

In order to find the distance travelled, substitute the time taken found in point A into the equation of the horizontal movement (using the vertical one you would calculate the height of the cliff):
x(t) = 8·t
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Hence, Lukalu lands 20.96 distance-units from the cliff.





8 0
4 years ago
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