x + 89
Best estimate is 20 x 40 = 800 Actual answer is 22 x 39 = 858
1 x 89, 89 x 1
Best estimate is 30 x 6 = 180 Actual answer is 192.34
89 + x = x +89
5922 is a little less than 6000 89 is a little less than 90 6000 x 90 = 540000 so of your choices: 531000 is the best estimate
846 x 7 = 5922
89+x=x 89=x-x 89=0 Therefore, "No solution".
x + 89
Best estimate is 20 x 40 = 800 Actual answer is 22 x 39 = 858
If x is one of the numbers then the other is (89-x). Both these are positive, so x>0 and 89-x>0 or x<89. Then P(x) = x*(89-x) = 89x-x2 where 0<x<89
279 X 89 = 24,831
1 x 89, 89 x 1
The best estimate is the true value.
Best estimate is 30 x 6 = 180 Actual answer is 192.34
8 x 37.5 = 300
6 x 3 = 18