Answer:
z = 0
Step-by-step explanation:
3 (z + 7) = 21
3z + 21 = 21
3z = 0
z = 0
3 is to 2 is the probability of drawing 4 marbles that are all blue.
<h2>
Explanation:</h2><h2>
</h2>
Hello! Remember you have to write clear questions in order to get good and exact answers. Here, I'll assume the function as:

The y-intercept of a function is the point at which the graph of the function touches the y-axis. This occurs when we set
. In other words, we define the y-intercept (let's call it
as:

Setting
in our function we have:

So <em>in this context the y-intercept is -16</em>
Bill should put the brackets around 18-9 so the correct answer is option B. 10- 4 +3 x (18-9)