5. Which statement is true? O A. The sum of two positive integers is sometimes positive, sometimes negative.
O B. The sum of two negative integers is always negative.
O C. The sum of a positive integer and a negative integer is always positive.
O D. The sum of a positive integer and a negative integer is always negative.

A. The sum of two negative integers is always negative

Step-by-step explanation:

Because if you have -3 and you add -4 it is the same as when you add positive 3 and positive 4 except with a negitive sign at the beginning

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.