9 Questions/45 points

1 answer:

3 0

You have a lot of questions here, try breaking them up into multiple posts and you may get more responses.

I will help with some.

<span>(x+3)=0

The solution is just -3.
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3m(m-4)=0

The two solutions are 0 and 4.
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(r-3)(r+2)=0

The two solutions are and 3 and -2.
</span>
I hope this gets you started in the right direction.

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If AB is 12, what is the length of A'B'?

lukranit [14]

Triangles ABC and A'B'C are similar. This means that the corresponding sides are in the same ratio, in this case:

$\frac{BC}{B^{\prime}C}=\frac{AC}{A^{\prime}C}=\frac{AB}{A^{\prime}B^{\prime}}$

Replacing with data:

$\begin{gathered} \frac{9}{6}=\frac{12}{A^{\prime}B^{\prime}} \\ 9\cdot A^{\prime}B^{\prime}=12\cdot6 \\ A^{\prime}B^{\prime}=\frac{72}{9} \\ A^{\prime}B^{\prime}=8 \end{gathered}$

7 0

10 months ago

Which number line shows the solutions of 13x−8≥x+6?

Leviafan [203]

$13x - x \geqslant 6 + 8 \\ 12x \geqslant 14 \\ x \geqslant \frac{14}{12} = \frac{7}{6 } = 1.167 \\ x \geqslant 1.167$