You had $26 in your pocket you purchase x pens for $3.50 each you now have $8.50 how many pens did you buy

Which product is positive a is 2/5 -8/9 -1/3 -2/7 b is -2/5 8/9 -1/3 -2/7 c is 2/5 8/9 1/3 -2/7 d is -2/5 -8/9 1/3 2/7

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !