A(a +5)=0 , how can l solve this problem? ​

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Find the commission on a $590.00 sale if the commission is 15%.

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?