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}

the answer is c

Step-by-step explanation:

all work is pictured

For this case we must indicate the solution of:

or

From the first inequality we have:

Subtracting 1 from both sides:

Dividing between 2 on both sides:

Thus, we have:

or

The solution will be:

(4,∞) or (-∞, - 1)

Option C

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

answer: what do you mean