Answer:
1 a. commutative property of multiplication
b. distributive property of multiplication
2 x=23\12
-x = -23\12
-23\12+23\12=0
thus -(-x)+x
In order to solve these sort of problems, we can set up 2 equations from the 2 statements.

We can subsitute the value of f, our first equation, into the second equation and solve like this:

Then we put the the son's age, 20, back into one of our equations and solve for the other value.

Thus, the father is 45 years old and the son is 20 years old.
Answer:
50% value change.
Step-by-step explanation:
A 100% increase from 10 would be 20. It's the equivalent of doing 10 times 2. We need 15 though which is half the distance in value to 10 than 20 is. Half of 100% is 50%.
Therefore, $15 is a 50% percent change from $10.
What is the question that you are asking? How many seats are left? 88. Or is there more to this question that is not showing?
it is equal to 2 1/2
Step-by-step explanation:
can I have brainlest plsss