100 to 49. Because area is units squared, and it is finding by multiplying the side lengths, you would simply square the ratio.
Answer:

Step-by-step explanation:
Notice that all three sides of the given triangle has one tick mark.
This means that all three sides are congruent, meaning that we have an equilateral triangle.
And for equilateral triangles, all three angles are also congruent.
So:

Also, recall that the interior angles of a triangle is always 180. Thus:

Substitute:

Combine like terms:

Substitute:

Multiply:

Thus:

And we are done!
You will subtract 12 from 260 and get 248 then you will divide 248 by 8 and get 31 dollars spent per book.
Step-by-step explanation:
The given inequality is

Subtract 10 from both sides


Divide both sides by 5 to get:

We draw a closed circle at 5 and draw the arrow to the left.
See it in the attachment.