Mary purchases b pounds of bananas for $1.89 a pound. let c(b) represent the total cost. describe the graph of the total cost of mary’s bananas.

i would say the graph would be greaterthen or equal to so a closed circle with a line pointing to the positive side/right side

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: