The value of x is -15.
Work:
x + 9 = -6
Move the 9 by subtracting from both sides.
x + 9 - 9 = -6 - 9
x = -15
Therefore x is -15.
The answer would be "B", 246 m2.
For question between 13 -> 17 replace n with the number.
Example:
13.) n = 2; 2+(-1) = 1
Let's make a proportion: 60/100 = 36/x. Cross multiply and find x. In this case, x would equal 60.
<span>1/root(5-x) = 1/(root5 * root 1- x/5)
1/root5 * (1-x/5)^-1/2
Using the 1st 2 terms of the binomial expansion 1 +nx:
1/root5 ( 1 + x/10)
= X/10root5 + 1/root5</span>
