does anyone know how to do similarity and right triangles? If so can you please help me and if you're going to help make sure you actually help me please​

What number produces an irrational number when multiplied by -1.25

Which of the statements about the graph of the function y = 2x are true? check all of the boxes that apply. the domain is all real numbers x because the exponent of 2 can be any real number when the x-values increases by 1 unit, the y-value multiplies by 2. the y-intercept is (0, 1). the graph never goes below the x-axis because powers of 2 are never negative. the range is all real numbers.

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