Ricardo spends $3.50 for lunch each day. Write and solve an equation to find how long it takes him to spend $21.00

3.50x=21.00
3.50(6)=21.00

6. A spiral toy that can bounce down a flight of stairs is made from 80 feet of wire. Write and solve an equation to find how many of these toys can be made from a spool of wire that contains 4,000 feet?
80x=4,000
80(50)=4,000

7. Your friend bought 3 bags of wild birdseed and an $18.00 feeder. Each bag of birdseed costs the same amount. If your friend spend $45 find the cost of one bag of birdseed
$9

All correct.