Show that any integer n > 12 can be written as a sum 4r + 5s for some nonnegative integers r, s. (this problem is sometimes called a postage stamp problem. it says that any postage greater than 11 cents can be formed using 4 cent and 5 cent stamps.)

What is the solution set of the quadratic inequality x^2-5< or equal to 0

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x

What is the x-intercept and y-intercept of the equation 2x+1. 2o