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DaniilM [7]
3 years ago
14

Solve x2+5x=-9 that’s all please (:

Mathematics
2 answers:
Lady bird [3.3K]3 years ago
7 0

Answer:

x = -1.28

Step-by-step explanation:

x2+5x=-9

7x = -9

x = -1.28

Shalnov [3]3 years ago
4 0

Answer:

x=-1.28571429

Step-by-step explanation:

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How many inches would a point on the outer edge of the large gear travel in a 150º rotation? (The gear has a radius of 4 inches)
MaRussiya [10]
Your answer would be 600. all u have to do is multiply the degree rotation to the radius.
hope this has helped.
8 0
3 years ago
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Solve: 3 = 27^2x+1<br><br> please solve quickly! thank you!
kap26 [50]

Answer: I believe this will be your answer for this.

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<u>(hope this helps!)</u>

8 0
2 years ago
Area of a regular hexagon with a base of 10 and an apothem of 12
Katen [24]
 <span>Draw a regular hexagon. Connect the center to each of the six vertices. Thus, you have six triangles, each with base 10.. The apothem is the height of each triangle. Then the area of each triangle is (1/2)(10)(12) = 60. You have six triangles so the aarea of the hexagon is 6*60 = 360.</span>
3 0
3 years ago
Al sumar y/o restar números decimales, siempre se debe aplicar la norma de los signos. * 1 punto FALSO VERDADERO
Luden [163]

Answer:

La norma de los signos es para el producto de números reales, y la norma es la siguiente.

(+)*(+) = (+)

(+)*(-) = (-)

(-)*(+) = (-)

(-)*(-) = (+)

Es decir, el producto de dos números de mismo signo es siempre positivo

El producto de dos números de distinto signo es siempre negativo.

Particularmente, para la suma esta norma no funciona (pues no está definida para la suma)

Pero en casos como:

5 - (-4)  

(esto sería: "la diferencia entre cinco y menos cuatro")

notar que podemos reescribir esto como:

5 + (-1)*(-4)

Ahora podemos aplicar la norma de los signos:

5 + 4 = 9

Donde aplicamos la norma de los signos,  

Podemos concluir que, si bien es una regla que aplica al producto, siempre la tenemos que tener en cuenta en cualquier operación que hagamos.

Por lo podemos concluir que la respuesta correcta es verdadero.

7 0
2 years ago
Triangle ABC had a perimeter 18 cm
Alex

Step-by-step explanation:

what is the main condition the lengths of the sides of a right-angled triangle have to fulfill ?

Pythagoras !

c² = a² + b²

c is the Hypotenuse (the baseline opposite of the 90 degree angle), a and b are the so-called legs (the sides enclosing the 90 degree angle).

only if there is a combination of the sides, for which the Pythagoras equation is true, do we have a right-angled triangle. otherwise not.

we also know CA = 18 - 7 - 3 = 8 cm

so, let's try

8² = 7² + 3²

64 = 49 + 9 = 58 wrong

7² = 8² + 3²

49 = 64 + 9 = 73 wrong

3² = 8² + 7²

9 = 64 + 49 = 113 wrong

so, there is no combination, where the Pythagoras equation is true, so it is NOT a right-angled triangle.

4 0
2 years ago
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