If someone start they home homework at 9: 10 and they finniches at 9: 45 how long did she speng on her home work

Time Spent = 45 minutes

Step-by-step explanation:

Given:

Starting Time = 9 : 10

Finishing time = 9:45

To Find:

Time spent on Home work = ?

Solution:

The time to find is always found by the difference between two times

So in this question

Time Spent = Finishing time - Starting Time

In time problems we subtract Minutes from minutes and then we will subtract hours from hours so

Time spent = 9:45    -   9:10

Minutes difference = 45 - 10 = 35 minutes

Hours difference = 9- 9 = 0

so

Time spent = 0 : 45 minutes

or

Time Spent = 45 minutes  

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,