Wha is nine less than an unknown number equals 15

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

The table below lists recommended amounts of food to order for 10 party guests. how much of each food item should nathan and amanda order for a graduation party with 55 guests? use the table to answer. item amount fried chicken 16 pieces lasagna 7 pounds deli meats 1.8 pounds sliced cheese 1 and two fifths pounds bakery buns 1 dozen potato salad 2 pounds

3.4a=57.8 what is the the value of a