How do i simplify -42+(-17) 8-(-9) 8(-9) -42 devided by(-7)

How to use order of operation in 20 divide by 4 multiply 5 = 1

25) 56(1) = 5b a. identity property of addition b. identity property of multiplication c. commutative property of multiplication d. commutative property of addition

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%