n is a number
"the sum of <span>a number and twelve" is (n+12)
"</span><span>Six times the sum of a number " is 6(n+12)
6(n+12)=40
6n+72=40
6n=40-72
6n= - 32
n=-32/6 = -16/3 or -5 1/3</span>
Answer:
https://www.calculators.org/math/standard-deviation.php
Step-by-step explanation:
you can calculate standard deviation from here with proper working plus accurate results.
For
ax^2+bx+c=0
discriminatn is b^2-4ac
a=4
b=12
c=9
discriinat is
12^2-4(4)(9)=
144-144
0
the discrminat is 0
Table b represents a function, the reason being that for each value of input, there is one and only one value of output.
