What is the answer for 6a + 5a = -11

Write a positive or negative number to represent each situation. a. you win 150 dollars in a contest b. a loss of 15 yards in a football game c. 75 feet below sea level d. 35 degrees above 0 f e. a debt of 24.75 dollars

Franco wants to double the volume of the cone. what should he do?

What is the value of x when x + 7 = 21?