Question

Evaluate 4a for a = 5 . Express your answer in simplest form.
20
22
45
20

Answer 1

Answer:
`\large \boldsymbol {\sf 22(2)/(3) }`

Explanation:

`\displaystyle \large \boldsymbol {} \sf Find \ \ 4 a \ \ ; \ \ if \ a=5(2)/(3) \\\\1-st \ method \\\\ 5(2)/(3) =5+(2)/(3) \ \ then \\\\ 4\cdot \bigg(5+(2)/(3) \bigg)=4\cdot 5+ (4\cdot 2)/(3) =20+(8)/(3) =20+2(2)/(3) =\boldsymbol {\sf 22 (2)/(3) } \\\\\\ 2-nd \ \ method \\\\ 5(2)/(3) =(5\cdot 3+2)/(3) =(17)/(3) \\\\\\ 4\cdot \bigg( (17)/(3) \bigg) =(4\cdot 17)/(3) =(68)/(3) =\boldsymbol {\sf 22 (2)/(3)}`

Answer 2

`\\ \sf\longmapsto 4(5(2)/(3))`

`\\ \sf\longmapsto 4* (17)/(3)`

`\\ \sf\longmapsto (68)/(3)`

`\\ \sf\longmapsto 22(2)/(3)`