Answer:
A....... x+y=216 and 2/3x+4/9y=118
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
hope this helps:))
Answer:
ultra violet is visible to the human eye
Answer:
7.5
Step-by-step explanation:
If we look at the 4 by 4 square around the triangle we can just do the area of the square minus the area of the 3 little triangles which is:
4 * 4 - 4 * 1 / 2 - 3 * 3 / 2 - 4 * 1 / 2
= 16 - 2 - 4.5 - 2
= 16 - 8.5
= 7.5
