Joe's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs joe $ 4.15 per pound, and type b coffee costs $ 5.20 per pound. this month, joe made 142 pounds of the blend, for a total cost of $ 685.90 . how many pounds of type a coffee did he use? number of pounds of type a coffee:

the answer i got is 1.08259221461

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.

the answer is a if my teacher taught me correct