Answer:
12 books
Step-by-step explanation:
Lets set aside $25 for dinner first.
Amount left = $230 - $25 = $205
Number of books able to buy = amount left ÷ cost per book
= $205 ÷ $17
= 12.058 books
Of course, you cant buy .058 books , that wont make sense, so you take the highest possible WHOLE number, which in this case, is 12 books.
Answer:

Step-by-step explanation:
see the attached figure to better understand the problem
we know that
----> by angle addition postulate
substitute the given values

Holly has 20 balls, and there are 100 balls in total.
So there are 100-20 = 80 balls left.
Alex had 2 * the amount Holly had, which is 20.
So Alex has 20 * 2 = 40 balls.
Together, they have 60 balls.
Which means 100-60 = 40. So Ben has 40 balls.
Check:
Holly: 20
Alex: 40
Ben: 40
Add them: 20 + 40 + 40 = 100
The hypotenuse is always double the shortest side.
so if, 2x = 6, then, x (the shortest side) = 6/2. the shortest side is 3 units.
Since there is a variable, there are infinitely many solutions.