Evaluate
6.2
Factor
\frac{31}{5} = 6\frac{1}{5} = 6.2
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2.8-\left(-\frac{15+2}{5}\right)
Multiply 3 and 5 to get 15.
2.8-\left(-\frac{17}{5}\right)
Add 15 and 2 to get 17.
2.8+\frac{17}{5}
The opposite of -\frac{17}{5} is \frac{17}{5}.
\frac{14}{5}+\frac{17}{5}
Convert decimal number 2.8 to fraction \frac{28}{10}. Reduce the fraction \frac{28}{10} to lowest terms by extracting and canceling out 2.
\frac{14+17}{5}
Since \frac{14}{5} and \frac{17}{5} have the same denominator, add them by adding their numerators.
\frac{31}{5}
Add 14 and 17 to get 31.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}