3 years ago

Which value of y makes the matrices inverses of each other ?

Mathematics

1 answer:

Nat2105 [25]3 years ago

6 0

Answer:

y = 1/2

Step-by-step explanation:

$a.{a}^{ - 1} = i$

A matrix multiplied by its inverse gives the identity matrix;

Based upon knowing this:

6(-1) + 14y = 1

14y = 7

y = 1/2

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^^^^^^^^^^^^^^^^^^^^

telo118 [61]

ANSWER

The correct answer is C

EXPLANATION

We want to find the quotient:

$- \frac{10}{19} \div ( - \frac{5}{7} )$

We multiply by the reciprocal of the second fraction:

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The correct answer is C

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