Arectangle is 3 times as long as it is wide. if the area is 12 square feet find its perimeter.

Find the area of the triangle shown 3 by 6

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls