Bob climbed down a ladder from his roof, while roy climbed up another ladder next to him. each ladder had 30 rungs. bob went down 2 rungs every second. roy went up 1 rung every second. a- let statement b- system of equations c-at some points , bob and roy were at the same height. which rung were they on ?

20 points for the answer. this is for real , don't put random ! a rectangle has a length of 4 centimeters and a width of 7 centimeters. what is the effect on the perimeter when the dimensions are multiplied by 5? the perimeter is increased by a factor of 5. the perimeter is increased by a factor of 20. the perimeter is increased by a factor of 25. the perimeter is increased by a factor of 100.