Step-by-step explanation:
using
The quadratic general formula
which is
r= -b±√(b²-4ac)
---------------
2a
b= coefficient of r=3
a = coefficient of r²=2
c= constant or number without any variable=-10
r= -3±√(3²-(4×2×-10)
-----------------------
2×2
r=-3±√(9-(-80)
----------------
4
r= -3±√(9+80)
------------
4
In the formula y=mx+b, b is the y-intercept. This means that it’s the point on the graph where the line intercepts on the y-axis.
For example if you have (2,5) that would be y=2x+5, so the y-intercept would be 5
Keep multiplying the number by 31, and write that down to show ur work
The overall increase of the price was 3 cents per gallon