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3 years ago

Warm up help plz and thx

Mathematics

1 answer:

galina1969 [7]3 years ago

4 0

Answer:

D. for the first one and B. for the second one i think

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se quiere pintar una pared en forma de hexágono regular y se sabe que cada lado mide 3m y que su apotema es de 2,8m cual es el a

qwelly [4]

Answer:

El área total a pintar será:

$A_{tot}=25.2\: m^{2}$

Step-by-step explanation:

Sabiendo el apotema y la longitu de los lados, podemos encontrar el área de un triangulo. Recordemos que, si trazamos rectas del centro del hexágono a los vértices, se formaran 6 triángulos equiláteros.

El área de un triángulo es:

$A_{t1}=\frac{b*a}{2}$

b es la longitud de la base (b=3 m)

a es la apotema, osea la altura del triangulo (a = 2.8)

$A_{t1}=\frac{2.8*3}{2}$

$A_{t1}=4.2\: m^{2}$

Ahora, solo debemos mutiplicar ese valor por 6 para determianr el área total de la pared.

$A_{tot}=25.2\: m^{2}$

Espero te haya sido util!

5 0

3 years ago

Her bank balance was -$90. she deposited $100 in her bank account on wednesday. what is her balance at the end of the day on wed

Nastasia [14]

We just need to add the 2 numbers together to find the balance at the end of Wednesday.

-90+100
=10

She had $10 at the end of Wednesday in her bank account.

7 0

3 years ago

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What is the probability of selecting a red card from a standard deck of 52 playing cardships that does not contain a joker?

Rasek [7]

We know that the deck of cards contain half red and half black cards or you can say we have 26 red cards and 26 black cards.
we have to find probability of red cards from a deck of cards
so,
probability (selecting red card) = $\frac{26}{52}$
= $\frac{1}{2}$

Probability ( selecting red card ) = <span> $\frac{1}{2}$ Answer</span>

4 0

3 years ago

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Sylvia placed 20 marbles in a bag: 10 red, 5 blue, green, 1 white. If

wel

The answer is 25 % hope it helps

6 0

3 years ago

Triangle ABC with vertices A (-1, 4), B( -4, 1), and C(-1, 1) is reflected across the y-axis and then translated 4 units to the

Anna71 [15]

Given:

Triangle ABC with vertices A (-1, 4), B( -4, 1), and C(-1, 1) is reflected across the y-axis and then translated 4 units to the left to form triangle A’B’C’.

To find:

The coordinates of the vertices of triangle A’B’C’.

Solution:

If triangle ABC reflected across y-axis, then

$(x,y)\to (-x,y)$