If a=2 when c=4, and c varies directly with a, what is the constant variation?

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 1, 2−√3

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?