Evaluate 15-0.75w+8x when w=12 and x=1/2

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Three times the sum of a number and seven is negative thirty-six. what is the number?