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andrey2020 [161]
3 years ago
7

The mass, m, of an object varies directly as the cube of its length, I.

Mathematics
2 answers:
steposvetlana [31]3 years ago
6 0

Answer:

m = 686.

Step-by-step explanation:

Direct variation :

m= kl^3 where k is a constant.

m = 250 when l = 5, so

250 = k *(5)^3

k = 250 / 125 = 2

So the equation of variation is m = 2l^3.

When l = 7:

m = 2 * (7)*3

= 2 * 343

= 686.

viva [34]3 years ago
4 0

Answer: 350

Step-by-step explanation:

m = kl (1)

Let 'k' be the constant of proportionality

When, m = 250

l = 5

inputting the values into equation (1)

250 = k5

dividing both sides by 5

250/5 = k5/5

50 = k

To find m, when l =7,

Given m = kl

where k = 50 and l = 7

m = 50 x 7

m = 350

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6(n-4)=3n<br> I need help I’m not good with math
lina2011 [118]

Answer:

n=8

Step-by-step explanation:

6(n-4)=3n

6n-24=3n

-24=-3n

n=8

7 0
3 years ago
Read 2 more answers
En una hoja de papel cuyo perímetro es de 96 centímetros, se quiere imprimir un volante de manera que el área impresa sea un rec
elixir [45]

Answer:

El perímetro de la región impresa es 72 cm y su área es 288 cm².  

Step-by-step explanation:

1. Tenemos el perímetro de la hoja de papel:

P₁ = 96 cm = 2l₁ + 2a₁  (1)  

Como sabemos el margen superior, inferior, izquierdo y derecho podemos encontrar la relación entre el largo y ancho del rectángulo interno (región impresa) con el largo (l) y ancho (a) del rectángulo externo (hoja de papel):      

l_{2} = l_{1} - (m_{s} + m_{i}) = l_{1} - (3 cm + 2 cm) = l_{1} - 5 cm  (2)            

a_{2} = a_{1} - (m_{d} + m_{iz}) = a_{1} - (2 cm + 5 cm) = a_{1} - 7 cm   (3)    

El perímetro del rectángulo interno es:

P_{2} = 2l_{2} + 2a_{2}    (4)

Introduciendo la ecuación (2) y (3) en (4):

P_{2} = 2l_{2} + 2a_{2} = 2(l_{1} - 5 cm) + 2(a_{1} - 7 cm) = 2l_{1} + 2a_{1} - 10 cm - 14 cm = 96 cm - 24 cm = 72 cm  

Por lo tanto el perímetro del rectángulo interno (región impresa) es 72 cm.

 

2. Ahora para encontrar el área rectángulo interno debemos encontrar el largo y ancho del mismo, sabiendo que:

l_{2} = 2a_{2}     (5)

Introduciendo (5) en (4):

P_{2} = 2l_{2} + 2a_{2} = 2*2a_{2} + 2a_{2} = 6a_{2}

a_{2} = \frac{P_{2}}{6} = \frac{72 cm}{6} = 12 cm

l_{2} = 2a_{2} = 2*12 cm = 24 cm

Entonces el área es:

A_{2} = l_{2}*a_{2} = 12 cm*24 cm = 288 cm^{2}

Por lo tanto el área del rectágulo interno (región impresa) es 288 cm².      

Espero que te sea de utilidad!  

7 0
2 years ago
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Ede4ka [16]
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3 0
2 years ago
What’s the correct answers for blankA and Blank B
zimovet [89]

Answer:

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Step-by-step explanation:

Remember that a trapezoid has no lines of symmetry.

4 0
3 years ago
Please help me figure this one out !!!
strojnjashka [21]
These are "composite" functions.
g(x+a)  means insert (x+a) into g(x) to replace every x:
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Now just Multiply and sum up the answer.

5 0
3 years ago
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