What is the value of x in the proportion x + 1 / x+3 = 15/ 21
a.4
b.1/3
c.1/4
d.3

Part a: select all of the ordered pairs that are located on the graph of the equation. part b: does the graph of the equation represent a function? select all correct answers for part a and one answer for part b.

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show