It is D because every time there is a box in the corner it's a right angle and they are always 90°
Answer:
Meaning of Sequence in Math:
In mathematics, a sequence is a listed collection of objects in which repetitions are permitted and order things. Like a set, it contains individuals (moreover called elements, or terms). The number of elements (possibly infinite) is called the length of the sequence.
-4e-9=19
+9+9
-4e=28
e=7
-4x7=28
so its e=7
We learned that ratios are value comparisons, and proportions are equal ratios. Ratios can be written with colons or as fractions. So, to compare the number of girls to boys in a litter of puppies, we can write 2:4 or 2/4 to say that there are two girls to four boys.