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2 years ago

A sofa is 12 years oldvand a table is 36 years omd.In how many years will the table be twice as old as the sofa ?

Mathematics

1 answer:

maw [93]2 years ago

4 0

Answer:

12 years later.

Step-by-step explanation:

Let assume in X years, the table will be twice as old as the sofa.

36+X=2(12+X), X=12

Or think it the other way. The difference of ages between two things never change. So they must have a difference(of age) of 24 forever. When will this difference(24) be as same as the younger's age so that the older one is exactly twice as old as the younger? 12 years later when the sofa is 24.

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2 years ago

M x-2 20 L Find the value of x. A.2 B.4 C.6 D.8

valentina_108 [34]

Answer:

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Step-by-step explanation:

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1 year ago

Find the distance between -3 and 4. A) -12 eliminate b) -7 c) -1 d) 7

n200080 [17]

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2 years ago

The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes)

saw5 [17]

Answer: $19.6

Step-by-step explanation:

Linear function: f(x)=mx+c

, where m= rate of change in f(x) with respect to x.

c = Initial value.

Let c = Initial value of card , m= Charge per minute

x= Number of minutes calling time.

Then, 25.06= 38m+c (i)

21.03=69m+c (ii)

Eliminate (ii) from (i)

$4.03=-31m\\\\\Rightarrow\ m=\dfrac{4.03}{-31}\\\\\Rightarrow\ m=-0.13$

Put m in (i) , we get

$25.06= 38(-0.13)+c\\\\\Rightarrow\ 25.06=-4.94+c\\\\\Rightarrow\ c=25.06+4.94\\\\\Rightarrow\ c=30$

i.e. f(x)=-0.13x+30

if x=80 then

f(80)= -0.13(80)+30

=-10.4+30

=19.6

Hence, the remaining credit after 80 minutes of calls = $19.6

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3 years ago

True or false: Weight which is less than 85% of what is considered normal for age and height is a main characteristic of bulimia

alex41 [277]

Answer:

True

Step-by-step explanation:

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2 years ago

A sofa is 12 years oldvand a table is 36 years omd.In how many years will the table be twice as old as the sofa ?​

A sofa is 12 years oldvand a table is 36 years omd.In how many years will the table be twice as old as the sofa ?