Need help with these 4 questions :’(

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Venita is sewing new curtains. the table below shows the relationship between the number of stitches in a row and the length ofthe row.sewingnumber of stitches length (cm)51 131532024306what is the relationship between the number of stitches and the length? othe number of stitches istimes the length.o. the number of stitches is 3 times the length.

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height