Please only answer if you're 100% sure it's correct. Thank you. (It's pretty easy.)

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8