Apologies for the bad handwriting.
The answer is B because Chris and three of his friends is 4. Then, each person paid $9 so 4 x 3 = x.
It’s -10
Explanation: 8 x 5= 40
40/-4= -10
1 bag=2cups. so, he uses 1 and 0.25 bags. there are 3.75 bags left. hope that helps)
Regular notation is 5790. scientific notation is 5.79 x 10^3