Ok, so the quadratic coefient is 1, so great
take 1/2 of the linear coefient and square it
10/2=5, (5)^2=25
add that to both sides
x^2+10x+25=7+25
factor perfect square trionomial
(x+5)^2=32
squaer root both sides
x+5=+/-4√2
minus 5
x=-5+/-4√2
x=-5+4√2 and -5-4√2
Dollars per gallon because the dependent quantity is the dollars
Dollars is the dependent quantity because the amount you pay depends on how many gallons you've pumped.
Answer: The third option is correct.
Step-by-step explanation:
In order for two equations to be parallel, the equations' slopes must be the same.
