If 2a+b=7 and b+2c=23, what is the average of a, b, and c?
a)5 b)7.5 c)15 d)12.25

Option A, 5

Step-by-step explanation:

If 2a + b = 7 and b + 2c = 23

Then we have to find the average of  a, b and c.

In other words we have to find the value of

By adding both the equations

(2a + b) + (b + 2c) = 7 + 23

2a + 2b + 2c = 30

2(a + b + c) = 30

(a + b + c) = = 15

⇒

Therefore, average of a, b and c is 5

Option A, 5 is the answer.

the transverse axis of a hyperbola is the line that contains the two vertices and the two focuses.

in this example (hyperbola of equation x^2/2 - y^2/4 = 1), the transverse axis is the  x-axis  . 

step-by-step explanation: