Can 12 cm 12 cm and 28 cm form a triangle

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

Need same math paper but the back now i hope your able to read it cleary i need with hw

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.