For 3, I would talk to your teacher there’s no way of knowing the total amount they spent since there is no way of knowing the total number of friends there were.
For 4 Dot traveled 18 miles an expression for that would be
2(2)+3+10=m
Then just
18=m
U have to common factor that add up to -5 but times to 4 so basically the answer would be (x+5)(x-1)= 0 then you would get
x+5=0
x-1=0
both x’s are going to be different and have to equal to zero
x=-5
x=1
for the other one u just have to get two number that multiply to -49
x^2=-49
u square root the -49 and get -7 but u have to have both a positive and negative for 7
so
x=-7
x=7
Answer: To find the price per pound we must divide 7.77 by 3, 7.77/3=2.59. So the price per pound for the gummy bears is 2.59$.