To find a percentage of a number, multiply by the decimal form of that percentage(20%=0.20). So, take the cost, $430, and multiply by common state sales tax (7% for me)---430 x 0.07 = 30.10 The sale tax rate is 7%.
Answer:
One of the negatives must go
Step-by-step explanation:
First divide both sides by - 5,

Move the constant to the right side of the equation and change its sign (-4 => +4)

Add the numbers,

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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey
-5a-4a+b<span>Simplifying
-5a + -4a + b
Combine like terms: -5a + -4a = -9a
-9a + b</span>
It is understood that 5.4^0 is the number 5.4 raised to the power zero.
There is a rule for this: any number raised to the power zero is 1.
So, 5.4 ^ 0 = 1.
You can show that any number raised to the power of zero is 1 using this:
A^0 = (A)^(m - m) = [A^m] / [A^m]
Given that the numerator and the numerator of that fraction are equals the result is 1.