Types of bicycles - what subheading would it go under - categorical, continuous numerical or discrete numerical

Acertain standardized? test's math scores have a? bell-shaped distribution with a mean of 520 and a standard deviation of 105. complete parts? (a) through? (c)

What is the reflection image of (5,-3) across the line y = -x?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827