Answer:
3x = 78+ (x-2)
Step-by-step explanation:
The exterior angle is equal to the sum of the opposite interior angles of a triangle.
3x = 78+ (x-2)
Answer:
4004
Step-by-step explanation:
The number of combinations of choosing r objects from a group of n is nCr.
So the number of ways to get 7, 8, 9, or 10 heads from 13 coin tosses is:
₁₃C₇ + ₁₃C₈ + ₁₃C₉ + ₁₃C₁₀
= 1716 + 1287 + 715 + 286
= 4004
Answer:
X= -5
Step-by-step explanation:
y varies directly with x,
so y=kx
-34=k×2
k= -17
85= -17× X
X= -5
Answer:
Step-by-step explanation:
3)8-13x
4)10b-9
5)4x-2
6)-4a-4