Answer: The correct option is
(E) 70.
Step-by-step explanation: We are given to find the number of triangles and quadrilaterals altogether that can be formed using the vertices of a 7-sided regular polygon.
To form a triangle, we need any 3 vertices of the 7-sided regular polygon. So, the number of triangles that can be formed is

Also, to form a quadrilateral, we need any 4 vertices of the 7-sided regular polygon. So, the number of quadrilateral that can be formed is

Therefore, the total number of triangles and quadrilaterals is

Thus, option (E) is CORRECT.
Answer:
% increase =
% decrease =
Step-by-step explanation:
Percentage Increase:
Let there be an original number. If it increased to a certain value we can calculate the percentage increase value with the help of following formula:
% increase =
Percentage Decrease:
Let there be an original number. If it decreases to a certain value we can calculate the percentage decrease with the help of following formula:
% decrease =
1. C (2,2)
2. H (-9,-5)
3. B (-2,6)
4. E (8,-4)
5. G (-4,-2)
6. ( 6,8)
7. A (-8,4)
8. F (4,-9)
1 week = 7 days

Answer : Thomas spends $9.80 on food in one week.
Hope this helps. - M
Answer:
291 .1
Step-by-step explanation:
80.2 + 91.6 + 123 + 204.7 + x = 790.6
790.6 - 499.5 = 291. 1