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Marat540 [252]
3 years ago
9

-5(k + 6) + 7(k – 4)

Mathematics
1 answer:
choli [55]3 years ago
4 0
The answer is- 2k-58.
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Chad drove 28 miles using one gallon of gas and all together he drove 308 miles using 11 gallons of gas. Chads car continues to
sashaice [31]

168/3=56

672/56=126

72/28=24

24 gallons of gas 



8 0
3 years ago
A) Dos números enteros positivos se diferencian en 6 unidades y la suma de sus cuadrados
lianna [129]

Queremos encontrar dos números enteros tales que su diferencia sea de 6 y la suma de sus cuadrados sea igual a 260.

Veremos que los dos números son 8 y 14.

Primero, podemos definir esos números como A y B.

Entonces tenemos que:

A - B = 6

A^2 + B^2 = 260

Esto es un sistema de ecuaciones.

Para resolverlo, el primer paso es aislar una de las variables en una de las ecuaciones, vamos a hacer esto en la primera.

A - B = 6

A = 6 + B

Ahora reemplazamos esto en la otra ecuación.

A^2 + B^2 = 260

(6 + B)^2 + B^2 = 260

36 + 12*B + B^2 + B^2 = 260

36 + 12*B + 2*B^2 = 260

Ahora podemos resolver esto para B:

2*B^2 + 12*B + 36 - 260 = 0

2*B^2 + 12*B - 224

Las soluciones estan dadas por la formula de Bhaskara:

B = \frac{-12\pm \sqrt{12^2 - 4*2*(-224)} }{2*2} \\\\B =  \frac{-12 \pm 44 }{4}\\\\B =  (-3 \pm 11)

Entonces las dos soluciones son:

B = -3 + 11 = 8

B = -3 - 11 = -14

Sabemos que los números son positivos, asi que elejimos la primera, entonces tenemos:

B = 8.

Con esto podemos calcular el valor de A como:

A - B = 6

A = 6 + B = 6 + 8 = 14

Entonces los dos números son:

8 y 14.

Si deseas aprender más, puedes leer:

brainly.com/question/24761554

6 0
2 years ago
I am looking for Mario he always has shoes as his pfp or him and his dog or a pic of a muscle car. PLEASE HELP its usally like m
Bezzdna [24]

Answer:

super mario time

Step-by-step explanation:

7 0
3 years ago
Please help with this question! (Brainliest)
Korvikt [17]

Answer: -45j -9k

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Is the surface area of the octahedron?<br> 10.4 cm<br> 12 cm<br> 12 cm<br> 12 cm<br> X<br> +
m_a_m_a [10]

the answer is 576 2 cm

Step-by-step explanation:

hope i helped

6 0
3 years ago
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