If x² − 7x + 12 = 0, what is the sum of the solutions?
It factors to (x − 3)(x − 4) = 0, giving 3 and 4, which sum to 7. Quicker still: for x² + bx + c, the sum of the roots is always −b.
Digital SAT practice test
Questions 5 and 6 of 10
A passage argues that remote work reduces commuting emissions. Which finding would most undermine it?
The argument is about total emissions. New emissions that replace the commute attack the conclusion directly. Job satisfaction is a different subject entirely.