You can use a calculator but the answer is 52.065.
What do you mean?
Could you explain please ;)
Answer:
-1
Step-by-step explanation:
Formula to the determinant is:
![\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] = ad-bc](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Da%26b%5C%5Cc%26d%5Cend%7Barray%7D%5Cright%5D%20%3D%20ad-bc)
0(0)–1(1)
0-1
-1
4 times 7 = 28
3 times 7 = 21
It will take him 21 days to make 28 bird houses.
Answer:
I don't understand the question