PLEASE HELP!!! IM SO CLUELESS

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation

What is perpendicular to y=-1/2x+11

Afarm is to be built in the shape of quadrilateral abcd, as shown below. all four sides are equal. a rhombus abcd is shown with diagonal ac equal to 15.5 feet and diagonal bd equal to 13.2 feet. what is the area of the farm? pleas only pick from the 4 below 62 square feet 52.8 square feet 57.4 square feet 102.3 square feet