Find k if the lines 3x-5y=9 and 2x+ky=11 are a) parallel and b) perpendicular

Jenny invested $300 in an account where her money doubles every 7 years. How much money will be in her account at the end of 35 years?

The radius of the base of a cylinder is 10 centimeters, and its height is 20 centimeters. A cone is used to fill the cylinder with water. The radius of the cone's base is 5 centimeters, and its height is 10 centimeters.

Estimate the circumference. Use 3.14 or to approximate π. A. 18.75 cm B. 19.63 cm C. 37.5 cm D. 39.25 cm

A farmer has 90 feet of fence with which to make a corral. If he arranges it into a rectangle that is twice as long as it is wide, what are the dimensions

Maggie's brother is 7 years younger than four times her age. The sum of their ages is 53. How old is Maggie?

What is the sum of the complex number 2+3i and 4+8i, where i=√-1?

Find the missing angle

At Brian's Bookstore, 0.3 of the shelves hold mysteries, 25% of the shelves hold travel books, and 7/20 of the shelves hold children's books. Which type of book covers the most shelf space in the store? Explain how you arrived at your answer.

What in math what does it mean when I'd a sample process is in control or not?

What is five and one fifths minus one and three fourths