2 years ago

Can someone help me solve for a ?

Mathematics

2 answers:

abruzzese [7]2 years ago

8 0

Answer:

A is 7

Step-by-step explanation:

They want to know what value of a makes the determinant 39. Reverse the operations; to find determinants you take the main diagonal and subtract the minor diagonal from it. So, add 24 (6*4) to 39 = 63 then divide by 7 and your answer is 9.

VikaD [51]2 years ago

3 0

Answer:

a=9

Step-by-step explanation:

39+24=63

63/7=9=a

The matrix can be solved by a calculator too.

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