Mrs. Higgins's was hoping to make some extra cash, so she invested 12000 in equipment to print yearbooks, each year book cost he
r $5 to print and she sells them for $15. how many yearbooks must she sell before she breaks even?
1 answer:
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Attached the solution and work.
Given:
Four equations in the options.
To find:
The equation which represents a proportional relationship.
Solution:
If y is proportional to x, then
where, k is the constant of proportionality.
In this case if x=0, then y=0. It means the graph of a proportional relationship passes through the origin.
From the given options, only option B, i.e., , is of the
, where,
.
So, the equation represents a proportional relationship.
Therefore, the correct option is B.
Step 1
Find the area of one equilateral triangle
Applying the law of sines
in this problem
a=b=7 cm
C=60 degrees
so
cm²
Step 2
To calculate the area of the hexagon multiply the area of one equilateral triangle by
cm²
therefore
the answer is the option
73.5 sqrt 3cm²
Answer:
Step-by-step explanation:
We can simplify (cross multiply) to get
Then we easily simplify to get