Question

Two numbers differ by 3. The sum of the greater number and twice the smaller number is
15. Find the smaller number.
Find the mean from the given information​

Answer 1

Answer:

The smaller number is 4. The mean of the two number is 5.5.

Step-by-step explanation:

Let the greater number be x and the smaller number be y.

According to the conditions provided:

$x - y =3...(i)\\x + 2y =15...(ii)$

Solve these two equations simultaneously as follows:

Multiply the first equation by 2:

$x-y=3]\times2\\x+2y=15$

⇒

Add the two equations:

$2x-2y=6\\x+2y=15$

⇒

$3x=21\\x=\frac{21}{3}\\ x=7$

⇒

Substitute the value of x = 7 in equation (i) as follows:

$x-y=3\\7-y=3\\y=7-3=4$

The smaller number is 4.

The mean of the two numbers is:

$Mean=\frac{7+4}{2} =\frac{11}{2}=5.5$

Thus, the mean is 5.5.

Answer 2

Answer:

same as the above answer Please mark me as brainliest