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kolezko [41]
2 years ago
14

Jan bought a blazer for $39.90. The price of the blazer was $38. What sales-tax rate was she charged for this blazer?

Mathematics
2 answers:
RUDIKE [14]2 years ago
5 0

1-38/39.90=0.0476
=0.05
=5 percent
lakkis [162]2 years ago
4 0
Price for the blazer: $38
Price for the blazer plus tax: $39.90

38x = 39.90
Where x is the sales-tax rate.

Divide both sides by 38
x = 1.05
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Popular Problems Calculus Find the Domain and Range f(x)=5x-3

f

(

x

)

=

5

x

−

3

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

(

−

∞

,

∞

)

Set-Builder Notation:

{

x

|

x

∈

R

}

The range is the set of all valid

y

values. Use the graph to find the range.

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(

−

∞

,

∞

)

Set-Builder Notation:

{

y

|

y

∈

R

}

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(

−

∞

,

∞

)

,

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x

∈

R

}

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(

−

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,

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