6 x 89 is 534
6 x (90 - 1) is 534. BUT you have to subtract 90 from 1 and that's 89. So then you multiply 6 by 89.
6 x 90 is 540 and 6 x 1 is 6. you take 540 subtract 6 and that's 534.
540 - 6 is 534.
Answer:
The bottom left choice is the answer
Step-by-step explanation:
Estimate
18=20
27=30
172=200
Check the Wronskian determinant:

The determinant is not zero, so the solutions are indeed linearly independent.
Answer:
2
Step-by-step explanation:
Because when solving the inequality you end up with 2
x