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A phone company surveys a sample of current
customers to determine if they use their phones most
often to text or use the Internet. They sort the data by
payment plans, as shown below.
SAS
Plan A 27 text, 21 Internet
Plan B: 13 text, 10 Internet
Answer the questions to determine a conditional
probability
How many customers are on payment plan B?
customers
How many of the customers on plan B text?
customers
What is the probability that a randomly selected
customer who is on plan B uses the phone most often
to text? Give the answer in fraction form.

true

step-by-step explanation:

the system of inequity is

step-by-step explanation:

from the given graph it is noticed that we have two related lines. one is solid and another is dashed.

if a line passing through two points, then the equation of line is

the solid line passing through the points (0,4) and (4,0).

the related equation of solid line is .

similarly, find the related equation of dashed line. the dashed liune passing through the points (0,0) and (3,1).

the related equation of dashed line is

from the given graph it is noticed that the point (0,1) lies on the shaded region, therefore the point (0,1) must be satisfied by the related equations.

check the related equations by the point (0,1).

this statement is true if the sign of inequality is < instead of equality. since it is an solid line therefore the sign of inequality will be . the required inequality is

similarly, check the second related equation.

it is a dashed line, so this statement is true if the sign of inequality is > . the required inequality is

m

step-by-step explanation: