What is the area of a pentagon if an apothem is 1.38 and the perimeter is 16

Does anyone know how to do geometryme with this problem

Given that abcd is a rhombus, what is the value of x?

Sera sells t-shirts at the beach. she believes the price of a t-shirt and the number of t-shirts sold are related. she has been experimenting with different prices for the t-shirts. she has collected a data set with five pairs of data; each consists of the price of a t-shirt and the number of shirts sold. the independent variable, which will go on the x-axis, is . the dependent variable, which will go on the y-axis, is the