Correct Answer: Option A

Explanation

\(\begin{vmatrix} x & 3 \\ 2 & 7 \end{vmatrix} = 15\)
x x 7 - 2 x 3 = 15
7x - 6 = 15
7x = 15+6
7x = 21
x = 21/7
x = 3

There is an explanation video available below.

• list five biochemical process that requires enzymes? Answer this

  0 Answers   ·   Chemistry   ·   7 minutes ago
• list four examples of each. 1.positive catalyst 2.negative catalyst 3.organic catalyst? Answer this

  0 Answers   ·   Chemistry   ·   8 minutes ago
• Factorize completely X² 2xy y² 3x 3y ─ 18? Answer this

  1 Answers   ·   Mathematics   ·   5 hours ago