(i have a deadline in 3 hours : c ) ann's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs ann $4.35 per pound, and type b coffee costs $5.40 per pound. this month's blend used three times as many pounds of type b coffee as type a, for a total cost of $780.90. how many pounds of type a coffee were used?

b is the correct answer

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus