When combing like terms the exponent never changes only the coefficient. when combining variables it must be the same variable and it must have the same exponent, if they do have the same variable and same exponent the coefficients add together. When combining constants add the numbers together.
The degree is the biggest exponent/sum of exponents in a term. A term is the sections in an expression separated by addition and subtraction signs.
You can find the missing angle in a right triangle by subtracting 90 from the reference angle.
Scientific notation is used to shorten large numbers. The format for scientific notation is 
I recently learned how to find the GCF (Greatest Common Factor) of two numbers. The GCF is the highest integer that divides into the two numbers. In order to find it, you need to first find the prime factors of the two numbers, then compare the two groups of prime numbers and look for pairs as illustrated below. Take one number from each pair and multiply it with the other numbers you take from the pairs, the product is the GCF.
How to find the prime factors.
How to find the GCF with the prime numbers.
