Step-by-step explanation:

1 gallon = 4 quarts.
2 gallons = 4 x2 = 8 quarts
She needs 8 quarts total and has 3 quarts.
8-3 = 5
She needs 5 more quarts.
I would say c hope this helps
Answer:

Step-by-step explanation:
4x^2+ 12x = 135
D=b²−4ac=122−4(4)(−135)=144+2160=2304=48²

In complex calculations like this, the precedence goes like this
B = Brackets
O = Of (or Exponent)
D = Division
M = Multiplication
A = Addition
S = Substraction
So, in your formula, it will go like this
1/2x3+1/4x2
= 0.5 x 3 + 0.25 x 2
= 1.5 + 0.5
= 2
Hope this helps.