A cell phone company offers two plans to its subscribers. At the time, new subscribers sign up; they are asked to provide some demographic information. The mean yearly income for a sample of 40 subscribers to Plan A is $57,000 with a population standard deviation of $9,200. For a sample of 30 subscribers to Plan B, the mean income is $61,000 with a population standard deviation of $7.100. At the 0.05 significance level, is it reasonable to conclude the mean income of those selecting Plan B is larger

step-by-step explanation:

whatvare the choices

step-by-step explanation:

answer:

given the linear inequality :

add 2y to both sides we get;

simplify:

add 12 to both sides of an equation;

simplify:

divide both sides by 2 we get;

or

the related equation for the inequality equation [1] is;

y-intercepts defined as the graph crosses the y-axis.

substitute x =0 in [2] to solve for y;

y = 6

x-intercepts defined as the graph crosses the x-axis.

substitute value y = 0 to solve for x;

subtract 6 from both sides we get

multiply both sides by 2 we get;

or

x = -12

now, plot these point (0, 6) and (-12, 0) on graph as shown below and shade the graph below the solid line.