H shows the ratio of pencils to pens sold at the school bookstore. If the bookstore sells 15 pencils, what is the ratio of pencils to pens sold written as a fraction?

Step-by-step explanation:

See attachment for complete question.

We start by solving for the equation of the graph (The graph shows a linear equation)

Represent pencils with x and pen with y

From the graph, we have that:

Solve for slope (m)

The equation is calculated using:

Where

Add 4 to both sides

Now, to the question.

When pencils is 15 implies that

Solving for x, we have:

i.e. Pen = 10

Ratio = x ; y

Convert to fraction

Simplify

Hence,

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.

cosine

step-by-step explanation: