Question

the average of 1,4,9,16,25,x,49 is 40.what is the value of x?​

Answer 1

Step-by-step explanation:

$= > (1 + 4 + 9 + 16 + 25 + x + 49) \div 7 = 40$

$= > 104 + x\div 7 = 40$

$= > 104 + x = 40 \times 7$

$= > 104 + x = 280$

$= > x = 280 - 104$

$= > x = 176$