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sertanlavr [38]
3 years ago
13

The average of two numbers is 25 and their difference is 8. What are the numbers?

Mathematics
1 answer:
nika2105 [10]3 years ago
8 0
x;y-the\ numbers\\\\  \left\{\begin{array}{ccc}\frac{x+y}{2}=25&|multiply\ both\ sides\ by\ 2\\x-y=8\end{array}\right\\+\left\{\begin{array}{ccc}x+y=50\\x-y=8\end{array}\right\ \ \ |add\ sides\ of\ the\ equations\\---------\\.\ \ \ \ \ \ \ \ 2x=58\ \ \ \ \ \ \ |divide\ both\ sides\ by\ 2\\.\ \ \ \ \ \ \ \ \ \ x=29\\\\29+y=50\\y=50-29\\y=21\\\\Answer:29\ and\ 21.
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Step-by-step explanation:

3 0
3 years ago
If N=10 then what is 2n+4
SOVA2 [1]
If n is ten then the expression would change to 
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3 0
3 years ago
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user100 [1]

Answer:

The correct option is 1.

Step-by-step explanation:

Inconsistent system: If the given system has no solutions, then it is an inconsistent system.

Consistent and independent system: If the given system has only one solutions, then it is an consistent and independent system.

Consistent and dependent system: If the given system has many solutions, then it is an consistent and dependent system.

The given equations are

x+3y=18        .... (1)

-x+2y=7         ..... (2)

Add both equations.

x+3y-x+2y=18+7

5y=25

y=5

Substitute this value in equation (1).

x+3(5)=18

x+15=18

x=3

The system of equations has only one solution, i.e.,(3,5).

Therefore the given system is consistent and independent. Option 1 is correct.

7 0
3 years ago
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beks73 [17]

Answer:

6

Step-by-step explanation:

Label them as variables

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Now try and list them

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The more mathematical way is using factorials

So you would do 3! which is 3*2*1

This also gives you 6

6 0
3 years ago
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