Which of the following is the solution set of 2a + 1 > 9 or a < –1?
a)
{a | a ≤ –1 or a ≥ 4}
b)
{a | –1 ≤ a ≤ 4}
c)
{a | a < –1 or a > 4}
d)
{a | a < –1 or a > 5}

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.