Answer:

Step-by-step explanation:
Step One: Convert
49/16x^2-2=-0.05x+4
Step Two: Multiply Both Sides by 80
245x^2-160=-4x+320
Step Three: Move everything to the left
245x^2+4x-480=0
Final Step: Quadratic Formula

Answer:
Probability that a customer pays the bill by mail, given that the customer is female is 0.20.
Step-by-step explanation:
The complete question is:
Online By Mail Total
Male 12 8 20
Female 24 6 30
Total 36 14 50
A utility company asked 50 of its customers whether they pay their bills online or by mail. What is the probability that a customer pays the bill by mail, given that the customer is female.
Probability that a customer pays the bill by mail, given that the customer is female is given by = P(Pays bill by mail / Customer is female)
P(Pays bill by mail/Customer is female) = 
Now, Probability that customer is female = 
Also, Probability that customer pays bill by mail and is female = 
So, Required probability = 
= 
=
= 0.20
Hence, probability that a customer pays the bill by mail, given that the customer is female is 0.20.
Answer:
-1/4
Step-by-step explanation:
We can find the slope of the line given two points
m = (y2-y1)/(x2-x1)
= (-9- -6)/(3- -9)
= (-9+6)/(3+9)
=-3/12
= -1/4