2.1 or 2. Hopefully this is right.
Let the first integer be x, the second one will be x+1.
the product of the integers will be:
x(x+1)=30
x^2+x=30
this can be written in the form of ax^2+bx+c=0, hence we shall have:
x^2+x-30=0
solving the quadratic we get:
x^2-5x+6x-30
x(x-5)+6(x-5
=(x-5)(x+6)
the numbers are x=5 and x=-6
Answer (-6,5) or (5,6)
You add the second equation to the first which eliminates x and leaves you with 2y=18 so you divide 18 by 2 which is 9 so y=9 now you fill in one question for y so do x+4(9)=9 you get x+36=9 now subtract 36 from 9 and you get -27 so x=-27 and y=9
1 ton = 2000 lbs
so 4 tons = 4 * 2000 = 8000 lbs
at 0.60 per lb...
8000(0.6) = $ 4800 <==
Explain more about the what 1-4 is