Answer:
100°
Step-by-step explanation:
sum of two interior angles in a triangle that is not adjacent to exterior angle is equal to that exterior angles
so
x° + 50° = 150°
x = 100
V = a^3
729 = a^3
9^3 = a^3
9 = a
answer. side length = 9 in
Answer:
36 Teachers in Total
Step-by-step explanation:
I would use Ratio.
Students: 128 + 121 + 135 = 384 total students
Teachers: Students
3 : 32
36 : 384
384 ÷ 32 = 12
12 x 3 = 36
Answer:
cosA = - ![\frac{7}{25}](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B25%7D)
Step-by-step explanation:
Using the double angle identity
cos2A = 2cos²A - 1 , then
cosA = 2cos²(
) - 1 , that is
cosA = 2 × (
)² - 1
= 2 ×
- 1
=
- ![\frac{25}{25}](https://tex.z-dn.net/?f=%5Cfrac%7B25%7D%7B25%7D)
= - ![\frac{7}{25}](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B25%7D)