Answer:
Step-by-step explanation:
4. 10x + 30 = 90
10x = 60
x = 6
complementary
5. 4x + 40 + 3x = 180
7x + 40 = 180
7x = 140
x = 20
supplementary
Find the mean, median, and mode for 0, 4, 6, 11, 9, 8, 9, 1, 5, 9, 7. Round to the nearest tenth if needed.
snow_lady [41]
Answer:
6
Step-by-step explanation:
you add them all up and divide it by how many numbers there are
2(x+-9)
2(x-9)
Distribute
2x-18 is the simplified expression
Answer:
n = 8
Step-by-step explanation:
(n−2) × 180 is the formula to find the interior angles of a polygon
(n−2) × 180 = 1080
Divide each side by 180
(n−2) × 180/180 = 1080/180
n-2 =6
Add 2 to each side
n-2+2 = 6+2
n = 8