Mrs. Adams bought cans of pears and cans of mixed fruit. • She bought a total of 17 cans at a cost of $68.70.
• Each can of pears cost $4.20, and each can of mixed fruit cost $3.90.
How many cans of mixed fruit did Mrs. Adams purchase?

why do wages differ across industries

step-by-step explanation :

micro economists are concerned with economics on an industry or individual firm basis.

macro economists are concerned with national and international level

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step-by-step explanation:

the true ones are a b and d

it has to have an angle of 90 degrees