1. given each set of vertices, determine whether
parallelogram abcd is a rhombus, a rectangle, or
a square. list all that apply.
a(15, 15), b(10, 15), c(10, 10), d(15, 10)

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

The correct answer is -4