X = 2 + √42,2- √42
decimal form: 8.480741, -4.480741
sorry if my answer isn't right
Answer:
0.02841 and 3.953
Step-by-step explanation:
The average has to be at least 120 and at most 130
To calculate the average we need the sum of all values divided by the number of values, in this case, three (135, 145 and the third result).
120 ≤ (135 + 145 + n)/3 ≤ 130
In inequalities like this, what we change in one side, must be changed in the othe rside as well.
360 ≤ 280 + n ≤ 390
80 ≤ n ≤ 110
Answer:
b
Step-by-step explanation:
These matrices ARE inverses of each other!