Find the value of x
1 answer:
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You don't have a question in there but I can tell you that the quadratic formula that is shown is not quite correct.
<span>x = -b ± √b2 - 4ac 2a
For one thing, the first 3 terms should ALL be divided by 2a
The square root symbol should be extended from b^2 through 4ac
The division symbol is missing.
So the quadratic formula SHOULD read:
x = [-b +- sq root (b^2 - 4ac) ] / 2a
Also I have attached a graphic of the quadratic formula.
</span>
<span>x = -b ± √b2 - 4ac 2a
For one thing, the first 3 terms should ALL be divided by 2a
The square root symbol should be extended from b^2 through 4ac
The division symbol is missing.
So the quadratic formula SHOULD read:
x = [-b +- sq root (b^2 - 4ac) ] / 2a
Also I have attached a graphic of the quadratic formula.
</span>
Okay, let's find out how much the tax was by finding out what 7% of $28 is, we do this by multiplying:
Convert 7% into a decimal, we do this by dividing it by 100 because percentages are parts of 100:
Multiply:
So this is the tax. Add it to the original price to get the total price:
Convert 7% into a decimal, we do this by dividing it by 100 because percentages are parts of 100:
Multiply:
So this is the tax. Add it to the original price to get the total price: