Carly is 3 times her brother's age. the sun of their age is no more than 24 years.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

What is the radius of the cone in the diagram? round your answer to the nearest whole number

Step by step explanation pls for 10 pts the length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?