What is the coefficient in the expression 5+9y?

Which of the following is the correct ratio for converting kilograms to grams

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax