Answer:
x = 23/9
y = 1/9
Step-by-step explanation:
2x - y + y - 5 = 5 + y - 5
2x - 5 = y
3x + 3(2x - 5) = 8
3x + 6x - 15 = 8
9x/9 = 23/9
x = 23/9
2x - 5 = y
2(23/9) - 5 = y
46/9 - 5 = y
1/9 = y
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..
Answer:
6
Step-by-step explanation:
To solve this , we use the equation of finding a slope wig a line.
m = (y2 - y1)/(x2 - x1)
From the question, we know that:
y2 = y
x2 = 3
y1 = 2
x1 = 1
m = 2
Hence,
2= (y - 2)/(3 - 1)
2 = (y - 2)/2
4 = y - 2
y = 2 + 4 = 6
You have to make a equation like 15m+5m=1800 and substitute m for 150 (m for dollars per hour. or whatever letter you want) and solve from there