Answer:
0.07 or 7%
Step-by-step explanation:
I = Prt
630 = (1000)(9)r
630 = 9000r
r = 0.07
Sales tax is a percentage of the sale price of an item that is then added on to the total price of the item.
Example:
let's say you are buying an item priced at $10.00 and the sales tax rate is 6%. Sales tax rates can vary from state to state and even within counties or cities.
That the result will be negative
because
a negative number, example -2 is equal to -1 times 2
odd power
even powers cancel negatives
so examle
(-2)^3=((2^3)((-1)^3)=(8)(-1)=-8
the concluseion is that the result will be negative
8x + 4y = -20
4y = -20 - 8x
y = -5 -2x
-4x - 8y = -20
-4x - 8(-5-2x) = -20
-4x + 40 + 16x = -20
12x = -60
x = -5
8(-5) + 4y = -20
-40 + 4y = -20
4y = 20
y = 5
