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Quiz
Arithmetic
5 problems similar to:
- \frac { 21 } { 15 } \cdot \frac { 4 } { 13 } = \frac { 21 } { 3 }
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-\frac{7}{5}\times \frac{4}{13}=\frac{21}{3}
Reduce the fraction \frac{21}{15} to lowest terms by extracting and canceling out 3.
\frac{-7\times 4}{5\times 13}=\frac{21}{3}
Multiply -\frac{7}{5} times \frac{4}{13} by multiplying numerator times numerator and denominator times denominator.
\frac{-28}{65}=\frac{21}{3}
Do the multiplications in the fraction \frac{-7\times 4}{5\times 13}.
-\frac{28}{65}=\frac{21}{3}
Fraction \frac{-28}{65} can be rewritten as -\frac{28}{65} by extracting the negative sign.
-\frac{28}{65}=7
Divide 21 by 3 to get 7.
-\frac{28}{65}=\frac{455}{65}
Convert 7 to fraction \frac{455}{65}.
\text{false}
Compare -\frac{28}{65} and \frac{455}{65}.
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Simultaneous equation
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}