Weekly Summary

1- Please evaluate and explain your answer using a number line: (-2) + (-5) Did you change direction or go in the same direction? Was your answer on the positive ("+") or negative ("-") side of 0? (please see section 1.1 for further review) 2- Please evaluate and explain your answer using a number line: (-6) + (+2) Did you change direction or go in the same direction? Simplify by removing unnecessary symbols: _ _ _ _ = _ _ (please see section 1-2 for further review) 3- Evaluate: (-2)3 + (-5 + 8) I 3 - 15 (Please see section 1-4 an 1-5) 4- If you are adding 2 numbers with different signs (direction), how would you find out the sign and number of the answer? Please evaluate and explain: 2 - 5 (please see section 1.1 for further review) 5- Remove grouping symbols and combine like terms: 5(2c -d) - (5c + 6d) (please see section 1-9 for review) 6- Add: 8 + H“ - (-1) + (-5) (please see sections 1.1 and 1-2 and for further review) 7- Simplify: 4(2x - 5) (please see sections 1-6 for further review) When multiplying or dividing signed numbers, count the number of negative signs: Even number of negative signs = + (positive) Odd number of negative signs = - (negative) 8- Evaluate: (-8)(-5) (please see section 1-3 for further review) 9- Evaluate: (-1)(+3)(-2)(-4) (please see section 1-3 for further review) -32 = -1*32 = -1 * 9 = -9 (order of operations) while (-3)2 = (-3)(-3) = +9 or 9 10- Evaluate: Z2 - X2 -XY if X = -2, Y = 3, and Z = -4 (please see section 1-8 for further review)      

Sample Solution