Three times a number decreased by five ikbetween 41 and 58. Enter your answer in interval notation.Interval notation of valid valuesO No interval of valid values

Respuesta :

Answer:

(-12, 21)

Explanation:

3 times a number decreased by 5 means 3x -5.

This number is between -41 and 58; therefore,

[tex]-41<3x-5<58[/tex]

Now we solve for the unknown number x.

Adding 5 to the three sides gives

[tex]\begin{gathered} -41+5<3x-5<58+5 \\ -36<3x<63 \end{gathered}[/tex]

finally, dividing the inequality by 3 gives

[tex]-12which in interval notation we write as [tex](-12,21)[/tex]

the parenthesis indicates that the -12 and 21 are not included in the solution interval =.