10. Brooke uses 40 gallons of water to wash her mom's car using a regular hose while Avery uses only 12.5 gallons of water washing her mom's car using a
pressure washer. How many quarts of water does using a pressure washer save?
+
027.5 quarts
55.0 quarts
0110.0 quarts 1100 quarts

step-by-step explanation:

i have no idea just need points sorry

step-by-step explanation:

b

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0