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Would like to know how to solve step by step I have no idea what to do here

Would Like To Know How To Solve Step By Step I Have No Idea What To Do Here class=

Sagot :

So first of all let's rewrite the inequalities. The first one is:

[tex]1.5x-1>6.5[/tex]

We can add 1 at both sides of it:

[tex]\begin{gathered} 1.5x-1+1>6.5+1 \\ 1.5x>7.5 \end{gathered}[/tex]

And we can divide both sides by 1.5:

[tex]\begin{gathered} \frac{1.5x}{1.5}>\frac{7.5}{1.5} \\ x>5 \end{gathered}[/tex]

So this inequality can be written as x>5. The second one is:

[tex]7x+3<-25[/tex]

We substract 3 from both sides:

[tex]\begin{gathered} 7x+3-3<-25-3 \\ 7x<-28 \end{gathered}[/tex]

And we divide both sides by 7:

[tex]\begin{gathered} \frac{7x}{7}<-\frac{28}{7} \\ x<-4 \end{gathered}[/tex]

So the inequalities are x>5 and x<-4. This means that the parts of the number line that must be colored are those at the right of 5 (according to the first inequality) and at the left of -4 (according to the second). Since the inequalities use the siymbols "smaller than" and "greater than" with no equals there must be blank dots at -4 and 5. The option that meets all these conditions is the second which is the answer.