Mr Jones has 20,000 to invest. He invests part at 6% and part at 7%, if hr earns 1,280 in interest after 1 year, how much did he invest at each rate.

Mary 's car will go 261 miles on 14.5 gallons of gasoline in highway driving. a) How many gallons will it take to drive 1641 miles from her house to a friend's house? b) How far can the car be driven on 139 gallons of gasoline?

Explain how to use grouping symbols to organize information appropriately.

1.5, 5/6, √16, 0.7, - 9, - √2, 0, π What are the whole numbers?

Find the inverse of f (x) = 2x + 3

For how many values of x: (4.9 cm < x < infinity) is it true that ex = 0?

Data was collected on the average winter temperature and the number of days with snow of a random group of cities in the United States.

What is x + 1 = 1/2x + 2

Answer to the problem ryan is thinking of a number. when he multiplies this number by 6 and then subtracts 15 from the answer, he ends up with his original number. what number is ryan thinking of?

Three times the difference of a number x and seven is twenty-three minus the sum of three times a number x and two. what is the value of x?

What is greater than 1 cup