Answer: Percentages help you out so you don't get cheated out of your money.
Step-by-step explanation:
When you go shopping and have to add in taxes and discounts you'll know whether or not you've spent too much or if you can spend more. They money system is based on percentages and know that will help you manage money better as a consumer.
Answer:
x=-5, x=9
Step-by-step explanation:
we know that
The formula to solve a quadratic equation of the form
is equal to
in this problem we have
equate to zero
so
substitute in the formula
therefore
The solutions are x=-5, x=9
Answer: The square root of a negative number can be expressed as an imaginary number.
Step-by-step explanation
No square root can be taken of a negative number within the system of real numbers because squares of all real numbers are non-negative.
Step-by-step explanation:
Since we have a vertical major axis, our ellipse is vertical.
The equation of a vertical ellipse is

where
(h,k) is the center
a is the semi major axis,
b is the semi minor axis
First, let plug in our center

Semi means half, so
a is half of 14 which is 7
B is half of 8, which is 4.
