A quadratic equation is written in the form
Looking at the second, third, and fourth options, we see that the highest powers are greater than two, which automatically disqualifies them from being quadratics (since the highest power in a quadratic is 2).
This makes the first option the correct choice since the expansion of the equation gives 

Therefore you need 4 batches of cupcakes if you want <u>every person to get one cupcake</u>.
- This means you multiply the amount of salt <em>per batch</em> by the number of batches, to get the total amount of salt you need.
- Each batch contains <em>1 teaspoon of salt</em> for 21 cupcakes. Multiply:
for the whole thing.
Answer:
y = -3x + 5
Step-by-step explanation:
(2, -1); m = -3
y - y1 = m(x - x1)
y + 1 = -3(x - 2)
y + 1 = -3x + 6
y = -3x + 5
Answer: the slope is 0
Step-by-step explanation: hope it helps