Write the phrase as an expression. Then evaluate when y=20. the quotient of 40 and the difference of a number y and 16

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths. ? 18 8 ? 10 30 12 ?

Which of these tools or constructions is used to inscribe a hexagon inside a circle?

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?