Answer:
21
Step-by-step explanation:
3×9=27
27-6=21
u do 9× 3 (nine times the quantity of three) is 27 then 3 less then double a number so u take 27 - 3x2= 6 (27-6) an it gives u 21
9×3=27
3×2=6
The first number is .
The second number is .
The circle "" in is the function composition operator. As its name suggests, it combines two functions, and , to give a new function.
In practice, is equivalent to . To calculate
In this case, and .
To find an expression for or , simply replace all occurrences of in with . That is:
.
Since , .
Hence, .
The expression is undefined only when the denominator is equal to zero. That is: .
Factor out to obtain: .
That happens either when or when .
$50.99.
₇P₅ is a permutation. you can find this setting in the statistics menu of your scientific calculator (i think).
If you don't have a scientific calculator, you can use the following formula:
nPr =
₇P₅ =
=
= 7 * 6 * 5 * 4 * 3
= 2520
Answer: C