When teaching a lesson on adding and subtracting integers, which two manipulatives can be used to enhance the learning outcomes?

Write 17/20 as a decimal and as a percent.

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?