4. Which two equations form a system of linear equations that has infinitely many solutions?
· A) 3x+2 y=5
B) 7-3 y=2
C) 3x+2y=7
D) 6x+4 y=10

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%

Plzzz answer both questions and i will give you 100 points