PLEASE HELP I FAILED THIS SO MANY TIMES

Prove the segments joining the midpoint of consecutive sides of an isosceles trapezoid form a rhombus.
Find the slope of EF and GD.

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)