Solve for x please help me

30

Step-by-step explanation:

all angles add up to 180*, 180-90=90, 90=3x, 30=x

x = 30

Step-by-step explanation:

One side is 90 so the other two sides have to add up to 90 too because a triangles' angles have to add up to 180.

So, we can write that 2x + x = 90

Then we can solve for x:

2x + x = 90

3x = 90

x = 30

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify