*Algebra steps: Remember ultimate goal - get the variable alone. First, move the constant (number without a letter) by either adding or subtracting. Then, move the coefficient (number right next to the letter) by multiplying or dividing.
*Triangles: Sum of angles in a triangle is 180 degrees. The sum of any two sides must greater than the 3rd side. The category names for the sides of triangles: scalene (none the same), isosceles (two sides the same), and equilateral (all sides the same). The category names for the angles of triangles: acute, obtuse, and right.
*Combining like terms: Remember you can only combine terms that match exactly (same letter, or no letter)
*Integer rules: Remember, subtracting is adding a negative. Adding: if they have the same sign, add like normal and keep the sign. If they have different signs, find the difference, keep the sign of the bigger number. Multiplying/dividing: positive times a positive is positive (+*+=+), negative times a negative is positive (-*-=+). Negative times positive is negative(-*+=-), positive times negative is negative (+*-=-).
*Unbiased samples = equal representation: simple random sample, systematic random sample
Biased samples = uneven representation: convenience sample, voluntary response
*Triangles: Sum of angles in a triangle is 180 degrees. The sum of any two sides must greater than the 3rd side. The category names for the sides of triangles: scalene (none the same), isosceles (two sides the same), and equilateral (all sides the same). The category names for the angles of triangles: acute, obtuse, and right.
*Combining like terms: Remember you can only combine terms that match exactly (same letter, or no letter)
*Integer rules: Remember, subtracting is adding a negative. Adding: if they have the same sign, add like normal and keep the sign. If they have different signs, find the difference, keep the sign of the bigger number. Multiplying/dividing: positive times a positive is positive (+*+=+), negative times a negative is positive (-*-=+). Negative times positive is negative(-*+=-), positive times negative is negative (+*-=-).
*Unbiased samples = equal representation: simple random sample, systematic random sample
Biased samples = uneven representation: convenience sample, voluntary response