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Nana76 [90]
3 years ago
9

Please help me ............

Mathematics
1 answer:
Marysya12 [62]3 years ago
6 0

Answer:

x+30=90

OR

180-120=x

The measure of the angle is 60 degrees.

Step-by-step explanation:

Plug in 60 as x and it will fit each equation.

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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
Look at the to equations _3X + 6 = 21, _3X + 6 &lt; 21. Which statement best describes the process used to solve the equations
Leto [7]

Answer:

What are the options?

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
USING ORDER OF OPERATIONS ANSWER THE QUESTION ATTACHED!
NeTakaya
X = 8 because you can do 40 + 35= 5x + 35. then take away 35 from both sides and you are left with 5x = 40. If you divide both sides by 5, you will get 8
3 0
4 years ago
Read 2 more answers
How to solve this 3/10÷1/2
Citrus2011 [14]
3/5 is your answer. Hope this helps. There’s a picture attached with the work.

8 0
3 years ago
-8=32-5q<br><br>how would I solve this
Alex

-8=32-5Q

5Q=32+8

5Q=40

Q=8

6 0
3 years ago
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