She should use a computer to select 30 students at random then ask which ones play chess. The other options could produce more skewed results.
Answer: -1.5
Step-by-step explanation:
Answer:
the last one
Step-by-step explanation:
Answer:
The answer to your question is x = 64; y = 20
Step-by-step explanation:
Angles 2x + 2 and 130° are vertical angles so they measure the same.
2x + 2 = 130
- Solve for x
2x = 130 - 2
2x = 128
x = 128/2
x = 64
Angles 3y - 10 and 50° are vertical angles, so they measure the same.
3y - 10 = 50
3y = 50 + 10
3y = 60
y = 60/3
y = 20
Answer:
9
Step-by-step explanation:
x+x+1+x+2 = 15+x+2
3x+3=x+17
3x=x+14
2x=14
x=7
7+8+9=24
9+15 = 24
