2 years ago

Evaluate the express (-5) x (-1) - (-2)=?

Mathematics

2 answers:

marishachu [46]2 years ago

5 0

What they said is correcttttt

Sergeeva-Olga [200]2 years ago

4 0

Answer: 7

Step-by-step explanation:

-5 x -1 - (-2).

First, -5 x -1 = two negatives make a positive, so 5.

Now, 5 - (-2), two negatives signs make a positive sign, so 5 + 2.

Now, 5 + 2 = 7.

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miss Akunina [59]

In the smallest of the three triangles (with sides $a,b,3$ ) we have

$a^2+3^2=b^2$

In the second-largest triangle (with sides $a,108$ ), the length of the missing side is $\sqrt{a^2+108^2}$ . Then in the largest triangle (with sides $b,111,\sqrt{a^2+108^2}$ ), we have

$b^2+\left(\sqrt{a^2+108^2}\right)^2=(108+3)^2=111^2$

$\implies b^2+a^2+108^2=111^2$

$\implies b^2+a^2=657$

Equivalently, we have

$(a^2+9)+a^2=657\implies 2a^2=648\implies a^2=324\implies a=18$

In turn, we find

$b^2=18^2+3^2=298\implies b=\sqrt{333}=3\sqrt{37}$

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Gnoma [55]

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umka2103 [35]

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