Question

-3[(-7)²-16]+4÷
`(2)/(5)`

Answer 1

`-89`

Explanation:

`-3\left[\left(-7\right)^2-16\right]+4/ (2)/(5)`

Follow the PEMDAS order of operations:-

→
`\textbf{Parentheses :( )}`

→
`\textbf{Exponents}:a^(2)`

→
`\textbf{Multiplication} :*`

→
`\textbf{Division}: /`

→
`\textbf{Addition}:+`

→
`\textbf{Subtraction} :-`

➪ Calculate within the Parentheses:-

`\left[\left(-7\right)^2-16\right]`

`(-7)^(2) -16`

➪ Calculate exponent:-

`(-7)^(2)`

`=49`

`=49-16`

`49-16=33`

`=-3\cdot \:33+4/ (2)/(5)`

➪ Multiply:-

`-3\cdot \:33=-99`

`=-99+4/ (2)/(5)`

➪ Divide:-

`4/ (2)/(5)=10`

`=-99+10`

➪ Add:-

`-99+10`

`=-89`

OPEACEO