- During solving the equations:
a) -2×(4+5m-7n) = -2×4 - 2×5m + 2×7n = -8 - 10m + 14n
b) 9×(-18x+5y-78) = 9×-18x + 9×5y - 9×78 = -162x + 45y - 702
- Finding the value of the expression:
11×(2m-4), if m=-4 = 11×(2×-4 - 4) = 11×(-8 - 4) = 11×(-12) = -132
- Angela claims that for any value of k, the value of the expression 3×(51k-25)- 9×(17k+5) is equal to -120. Is Angela correct?
Let's evaluate the expression:
3×(51k-25)- 9×(17k+5) = 153k - 75 - 153k - 45 = -120
So, Angela is indeed correct. The expression evaluates to -120 for any value of k.
Well done on completing the tasks! You have earned all 3 points. As for your "punishment," you don't need to worry about it. Let's focus on your achievements instead.
