There are three cell phone models in a store. when selecting a new cell phone, 25% of the customers choose model a, 33% choose model b, and 32% choose model c. the remaining customers buy from an old collection on which the average profit is $50. if the average profit earned on models a, b, and c is $60, $75, and $40, respectively, what is the expected value of the profit earned on all models?
a] $55.75

b] $57.55

c] $59.25

d] $60.25

The answer is B. or $57.55

This also works if you are using plato

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!