The mathematical expression 9 ∈ t means:

a.) 9 union t
b.) 9 intersection t
c.) 9 is an element of t
d.) 9 is not an element of t

Given the function f(x) = 3x + 1, evaluate f(a + 1). a. 3a + 1 b. a + 2 c. 3a + 4

State if the two triangles are congruent. if they are, state how you know?

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?