x − y = 0 = difference
x + y = 4 = sum
Can be solved by the sum and difference rule (most of the time without pen and paper)
x=(sum+difference)/2=0+4/2=2
y=(sum-difference)/2=(4-0)/2=2
7x^2 + 3
7(4)^2 + 3
7(16) + 3
112 + 3
115.
Just about everyone here writes a power like this:
4x^2 which means 4x squared.
If you have a Windows computer, you could hold down the "ALT" key and at the same time, type in the number 0178 and you will get this ²
So then you could type 4x² just as it should appear.
your total would be $10 and you have 1 variable. so it would be ($2x) for the pounds of veggies, plus the 3.50 for the basket, equals $10. then solve for X from there
