Answer:
6.17
Step-by-step explanation:
Answer:
315
Step-by-step explanation:
Area = Length x Width
Area = 21 x 15
Area = 315
Answer:
1. $58650
Step-by-step explanation:
Aidan has put 21 hours of work. To simplify it, Harry worked 7 hours and Aidan worked 7 x 3 times which equates to 21 hours.
If the matrix is of 2 by 2 then we can find the determinant of the matrix.

Then (ad - bc ) gives you the determinant of the matrix.
For example,

= (2)(-2) - (1)(4)
= - 4 - 4
= -8