Twice the number n is no less than 10 units from -1

Carter drank 15.75 gallons of water in 4 weeks. he drank the same amount of water each day.a. estimate how many gallons he drank in one day.b. estimate how many gallons he drank in one week.c. about how many days altogether will it take him to drink 20 gallons?

Find the value of x for which abcd must be a parallelogram -9-6x x-30

If 20% of a number is 35, what is 50% of that number?