Question

1 14 แ li ! 14 badute Value ineguanten NM แจls แทนเจ 1 ปี 58 หมอยอด | |44| |14 นางอ 24.122 (Mitr 5.1 \\\\\ย - 5 \\

Answer 1

$\begin{gathered} 2|10b\text{ +7| -1 >73} \\ 2|10b\text{ +7|>73+1} \\ 2|10b\text{ +7| }>\text{ 74} \end{gathered}$$\begin{gathered} |10b+7|>\frac{74}{2}\text{ } \\ |10b\text{ + 7|>37} \end{gathered}$

This implies that

$\begin{gathered} 10b\text{ +7 }>\text{ 37} \\ or \\ 10b\text{ +7 <-37} \end{gathered}$$\begin{gathered} \text{if 10b + 7>37} \\ \text{then 10b >37-7} \\ 10b\text{ >30} \\ b\text{ >}\frac{30}{10} \\ b\text{ >3} \end{gathered}$$\begin{gathered} \text{if 10b + 7<-37} \\ 10b\text{ <-37-7} \\ 10b<-44 \\ b<\frac{-44}{10} \\ b<-4.4 \end{gathered}$

Combining them we have

-4.4

Now to the graph