Answer:
x=-21
Step-by-step explanation:
1/3x + 9 = 2
subtract 9 on both sides
1/3x = -7
multiply 3 on both sides bc its the reciprocal of 1/3
and you get -21
Answer:
Step-by-step explanation: 40 and 24 are 5:3. We know his because:
- 40/8=5
- 24/8=3
That's how we know 40:24 = 5:3.
Slope: -3
y-intercept: (0,7)
Answer:
2.0
Step-by-step explanation:
Couldn't really understnd what you wrote but I'll assume it's the standard deviation of a fair, 7-sided die
The standard deviation is just the square root of the variance (which is just the second moment minus the first moment squared)
The first moment (AKA the average is..)

The second moment is..

