Cho các ma trận A, B vuông cấp 4.Biết rằng det(A^2) =64m^2 ,det(2B)=-32 a) tìm m để det(A)=12
b)Tìm m đẻ A khả nghịch. Khi đó hãy tính det(4A^-1) theo m
c) Khi m=1/4 hãy tính det(A),det(B),det(3*A^2),det(A^4*B^ 2),det(A^2*B+A^2)

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

❤️ (geometry) does the construction demonstrate how to copy an angle correctly using technology a) yes; the distance between points a and f was used to create circle h b) yes; the distance between points f and g was used to create circle h c)no; the distance between points a and f was used to create circle h d) no; the distance between points f and g was used to create circle h

Ashley spent half of her lunch money on a turkey sandwich. then she spent two-thirds of the money she had left on a bottle of juice and the rest of the money on a cookie. if the cookie cost $.75, how much lunch money did ashley have to start with?