<span>Standard deviation is the square root of variance. Variance is always a non-negative number, since you can't take the square root of a negative number. So neither can be negative </span>
subtract 3 from both sides to isolate the variable
Z + 3 -3 = -6 -3
Z + 0 = -9
Z = -9
Answer:
A. -8c+6
Step-by-step explanation:
2(-6c+3)+4c
=-12c+6+4c
=-8c+6
Answer:
$2.50 · $0.75x = total cost
Step-by-step explanation:
$2.50 is the rental fee, and it costs $0.75 each night she has it, so if she has the movie for x nights, multiply $0.75 by the number of nights and add it to the initial rental fee.
