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11Alexandr11 [23.1K]
4 years ago
10

Help help help help help help help help help help

Mathematics
2 answers:
SVETLANKA909090 [29]4 years ago
8 0

I am not really sure, but I can say that I would go with; either B or C.  Sorry...

Anon25 [30]4 years ago
3 0

Answer:

It's C!

Step-by-step explanation:

You might be interested in
A phone is on sale for 40% off the original price is $550 what price will you pay
Leni [432]

Answer:

$330

Step-by-step explanation:

40% of $550 is $220

$550 - $220 = $330

3 0
3 years ago
Una piscina rectangular de 15 m de largo por 9m de ancho está rodeada por un camino de cemento de ancho uniforme. ¿Si el área de
malfutka [58]

Answer:

El ancho del camino es 1.5 m.

Step-by-step explanation:

Una piscina rectangular posee 15 m de largo por 9 m de ancho.

El área de un rectángulo es igual a la base por la altura. Es decir, lado mayor por lado menor. Entonces el área de la piscina es 15 m* 9 m= 135 m²

La piscina está rodeada por un camino de cemento de ancho uniforme, al cual se denomina x y estará en unidades de metros (m). Entonces el largo de la piscina sumado al ancho a ambos lados de la piscina será 15 m + 2*x, mientras que el ancho de la piscina sumado al largo a ambos lados de la piscina es 9 m + 2*x. Entonces este área se puede expresar como

(15 m+2*x)*(9 m+ 2*x)

Entonces al área de la piscina sumado al camino se le resta el área de la piscina y da como resultado el área del camino, cuyo valor es 81 m²:

El área total - área de la piscina =  área del camino

(15 m +2*x)*(9 m+ 2*x) - 135 m²= 81 m²

Resolviendo:

15*9 m²+15*2*x + 9*2*x + 2*x*2*x - 135 m²= 81 m²

135 m² + 30*x + 18*x + 4*x² - 135 m²= 81 m²

48*x + 4*x² = 81 m²

48*x + 4*x² - 81 m²= 0

Siendo una ecuación cuadrática donde a= 4, b= 48 y c= -81, entonces:

\frac{-48+-\sqrt{48^{2}-4*4*(-81) } }{2*4}

Resolviendo:

\frac{-48+\sqrt{48^{2}-4*4*(-81) } }{2*4}= 1.5

\frac{-48-\sqrt{48^{2}-4*4*(-81) } }{2*4}= -13.5

Como las distancias solo pueden ser positivas, entonces <u><em>el ancho del camino es 1.5 m.</em></u>

En la imagen adjunta se puede observar un gráfico de la piscina más el camino

5 0
3 years ago
Which of the following is a true statement concerning the use of a placebo?
Inessa05 [86]

Answer:

its B

Step-by-step explanation:

8 0
3 years ago
Write an equation of the line with slope -1 passing through (8,5).
True [87]

Answer:

y = -1x + 13

Step-by-step explanation:

y = -1x + b

5 = -1(8) + b

5 = -8 + b

13 = b

8 0
3 years ago
A bike wheel is 26 inches in diameter. What is the bike wheel's diameter in millimeters (1 inch = 25.4 millimeters)?
Alex

Given that, a bike wheel is 26 inches in diameter.

We need to convert bike wheel's diameter in millimeters .

Since, 1 inch = 25.4 millimeters.

So, to convert 26 into mm we need to multiply 26 each sides of this identity to convert this into mm. Hence,

1*26 inch = 25.4 * 26 mm.

So, 26 inches = 660.4 mm.

So, the bike wheel's diameter is 660.4 millimeters.

Hope this helps you!

6 0
3 years ago
Read 2 more answers
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