can someone please help me(20 points will give brainliest!!!)

Answer:
g(2) = 16; g(-2) = 4; g(a) = 3a + 10; 3(a+2) = 3a + 16
Step-by-step explanation:
We want to substitute the value in the parentheses on the left-hand side for the value of x on the right-hand side
Thus, g(2) = 3(2) + 10 = 6 + 10 = 16
g(-2) = 3(-2) + 10 = -6 + 10 = 4
g(a) = 3(a) + 10 = 3a + 10
g(a + 2) = 3(a + 2) + 10 = 3a + 6 + 10 = 3a + 16