**Answer:**

17. See below

18. 750

**Step-by-step explanation:**

17. Since the lollipops are being sold at the same price, 50 cents, for each one sold, they make a constant amount of money. For each increase in lollipops sold, there is a constant increase in money made, and thus the situation is a linear function.

18. To solve this equation, let's say y is the money made at the convention in dollars and x is the number of lollipops sold. If the principal gave them 125 dollars before they sold any lollipops (0 lollipops sold), then 125 is the y-intercept of the function, and in the equation y=mx+b, b=125. If each lollipop costs 50 cents (half of a dollar), then for each lollipop, x, sold, .5 dollars are made and are added to the profit, y. Thus, .5 dollars is the slope. The equation then becomes:

Now, if they need 500 dollars, y is thus equal to 500 dollars. Solving the equation:

Thus, 750 lollipops must be sold.

**Answer:**

3 + 2 - 4 = ?

**Step-by-step explanation:**

**Answer:**

3590 per year

**Step-by-step explanation:**

**Answer:**

volume of a cylinder

**V**= TTr² h

V= volume

TT= pie

h= height

**Step-by-step explanation:**

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**V****=****TTr****²****h**** **

r= 8/2 =4cm

**V**= 3×4²×12

**V****=**3×16×12=576cm³

**Only 3 is needed **

**Step-by-step explanation:**