6. QRST is a parallelogram. Find y.

A. 15
B. 14
C. 13
D. 12

y = 15

Step-by-step explanation:

As QR parallel to TS

QR = TS

11 = y - 4

y = 11 + 4

y = 15

Step-by-step explanation:

Please, no more than 2-3 questions per post.

#1:  domain:  set of all real numbers; range:  all real numbers from minus infinity to +4

#8:  Domain:   x = 4; range:  all real numbers

The domain of a function is the set of input values (often x-values) for which the function is defined; that is, for which a graph exists.

The range of a function is the set of all possible output values (which does not mean "all real numbers."