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A 2 × 2 matrix A has determinant 5. Every entry of its… | StemPy Lab

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A 2 × 2 matrix A has determinant 5. Every entry of its inverse is doubled to make a new matrix. What is the determinant of the new matrix?

MathematicsMediumHigh School (11–12)Algebra › Matrices and Determinants A-Level AEEE (Amrita)AMUEEE AP EAPCET BCECE COMEDK UGET CUET UG GUJCET IB JCECE JKCET KCET KEAM KIITEE LPUNEST MET (Manipal)MHT-CET OJEE SRMJEEE TS EAPCET UPESEAT VITEEE

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A $2 \times 2$ matrix $A$ has determinant $5$ . Every entry of its inverse is doubled to make a new matrix. What is the determinant of the new matrix?

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← A and B are invertible matrices of the same order. Which expression equals (AB)⁻¹?A café sells a cup of tea and a cake for a total of 7 euros. Three cups of tea and two cakes cost 17 euros altogether. Let x be the price of a cup of tea. Solving the system with the inverse of the coefficient matrix, what is x in euros? →

More onAlgebra › Matrices and Determinants

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