Evaluate
78.8
Factor
\frac{2 \cdot 197}{5} = 78\frac{4}{5} = 78.8
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15+0.2\times 78+0.2\times 76+0.2\times 81+0.2\times 84
Multiply 0.2 and 75 to get 15.
15+15.6+0.2\times 76+0.2\times 81+0.2\times 84
Multiply 0.2 and 78 to get 15.6.
30.6+0.2\times 76+0.2\times 81+0.2\times 84
Add 15 and 15.6 to get 30.6.
30.6+15.2+0.2\times 81+0.2\times 84
Multiply 0.2 and 76 to get 15.2.
45.8+0.2\times 81+0.2\times 84
Add 30.6 and 15.2 to get 45.8.
45.8+16.2+0.2\times 84
Multiply 0.2 and 81 to get 16.2.
62+0.2\times 84
Add 45.8 and 16.2 to get 62.
62+16.8
Multiply 0.2 and 84 to get 16.8.
78.8
Add 62 and 16.8 to get 78.8.
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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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}