Quadratic functions are second-order equations of the form y=ax^2+bx+c. Their graphs form parabolas. The defining characteristic of a quadratic is that the acceleration of the outputs is a constant.
Answer:
positive
Step-by-step explanation:
From the number line
x>0 so it is positive
y <0 so it is negative
xy = positive * negative
= negative
-xy = negative * negative
= positive
Since y is the original cost, let z represent the final cost. So, we set up the expression, (0.12y + y) - 0.03y = z. That shows first the sale, then the tax. From there, we simplify to get 1.12y - 0.03y = z, then simplify it more to get 1.09y = z. We take away the z, and get that the cost, which is 1.09, or 109%, or y (1.09y).
With Fractions? For example in 1/2 divided by 2/3 what you do is you leave the first fraction alone so it stays 1/2, then you change the sign from divide to multiply so it becomes 1/2 x by and then you take the next fraction and flip it upside down so 2/3 becomes 3/2. So 1/2 divided by 2/3 becomes 1/2 x 3/2. Only works with divisions
