Help!!

What equation is equal to this 1/2 (x + 6) =
A.1/2 • x + 3
B.2 • x + 3
C.1/2 • x + 6
D.(1/2 • x) + 3

Which expression is equivalent to the following expression: (There are 2 answers)
5.3 – y + 4.2

A. y - 9.5

B.–y + 9.5

C.9.5 – y

D.4.2 - y

E.5.5 + y + 4.2

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

What are the values of each variable in the diagram below?