1)positive
Step-by-step explanation:
Let a=2 and b=-2
substitute it in -4ab
-4(2)(-2)=16
it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.
step-by-step explanation:
copy and paste, put it in google
d is the correct answer
x= 8 because 3x = 3 * 8, and 3*8 = 24