Iam f years old and my brother is b years older. what is the sum of our ages?

If you are F years old and your brother is B years older, then your brother is F+B years old. Add your age (F) and your brother's age (F+B) and you get F+(F+B) = 2F+B

The sum of your ages is 2F+B

where F and B are placeholders for numbers.

associative property of multiplication

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.