Answer: The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!
Step-by-step explanation:
Answer:
14.29% probability that Marlon's friend will think of the number 9
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
In this problem, we have that:
There are 7 numbers from 5 to 11(5,6,7,8,9,10,11)
9 is one of them
So

14.29% probability that Marlon's friend will think of the number 9
Answer:
Yes it is true
Step-by-step explanation:
15/10 equals 1.5
Answer:
f(x)=5x^2 + 9
Step-by-step explanation:
all numbers are odd