A submarine began its day 300 feet below sea level and by noon it climbed 200 feet. Around 2 pm the submarine descended 600 feet. What is the depth of the submarine at 2 pm?

Which of the following is the result of expanding

Answer asap. you begin with 1/2 scoop of ice cream. since you're hungry, you ask the vendor for 2/7 more scoops of ice cream. then, you eat 5/8 scoops. how many scoops of ice cream are left on your cone? i will mark brainliest for first correct answer.

For what values of a is the sum of the fractions 2a−1 / 4 and a−1 /3 positive?