What is the determinant of D.​

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if