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Sergio039 [100]
3 years ago
11

Solve the following quadratic equation:

Mathematics
1 answer:
Advocard [28]3 years ago
4 0

Answer:

-3.5 or -6

Step-by-step explanation:

2x^2+19x+40=-2

2x^2+19x+40+2=0

2x^2+19x+42=0

2x^2+(12+7)x+42=0

2x^2+12x+7x+42=0

2x(x+6)+7(x+6)=0

(x+6)(2x+7)=0

either,

x+6=0

x=-6

or,

2x+7=0

2x=-7

x=-7/2

x=-3.5

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Flauer [41]

Respuesta:

Los 3 triángulos son semejantes.

Explicación paso a paso:

En estos casos nos dan a conocer los ángulos de los triángulos, por lo tanto el criterios de semejanza se reduce si más de dos de sus ángulos internos son iguales.  

Por lo tanto, sabemos que en los triángulos ABE y BCD presentan los mismos ángulos, 80°, 40° y 60° por lo que podemos afirmar que ambos triángulos son semejantes.

Ahora bien, para el triangulo BDE, podemos conocer solo un angulo del que es de 80°, pero el resto sería desconocido, lo que quiere decir que no podríamos determinar si es semejante con los otros, pero por medio de los ángulos externos determinamos que si corresponde también a 60° y 40°, por lo tanto, los 3 triángulos son semejantes.

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4 years ago
The stairway shown is made of solid concrete. The height of each step is 8 inches (in.) and the width is 15 inches. The length i
expeople1 [14]
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A=lwh
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7 0
3 years ago
Need help please make sure your right people have been saying wrong answers​
sweet [91]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
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zaharov [31]

<em><u>Answer:</u></em>

The unit rate is $2.86 per hour

<u><em>Explanation:</em></u>

The units rate is amount earned in 1 hour

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<u>To get the unit rate, we will use cross multiplication as follows:</u>

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Hope this helps :)

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