Answer:
Step-by-step explanation:
2x + 7 > 20
2x > 13
x > 6.5
For b, by moving coins the mode and median changes but only the mean doesn't change.
Answer:
There are 325 seats in each row
Step-by-step explanation:
78 × 325 = 25,350
Answer:
z = 83 / (- c + 6 - t)
Step-by-step explanation:
Given:
-cz+ 6z = tz + 83
z=?
-cz+ 6z = tz + 83
Collect like terms
-cz+ 6z - tz = 83
Factorize
z(- c + 6 - t) = 83
Divide both sides by (- c + 6 - t)
z(- c + 6 - t) / (- c + 6 - t) = 83 / (- c + 6 - t)
z = 83 / (- c + 6 - t)
Formula

Z=standard score
x=observed value
u=mean of the sample
standard deviation of the sample