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3 years ago

Solve equation? 3(-7+r)=-36

1 answer:

8 0

Hey there!

First we need to add by $21$ on each of your sides

Like: $3r - 21 + 21 \\ \\ -36 +21$

This gives us: $3r = 15$

Now we have to $divide$ by $3$ on each sides

Like: $\frac{3r}{3} \\ \\ = \frac{-15}{3}$

$Answer: r = -5$

Good luck on your assignment and enjoy your day!

~ $MeIsKaitlyn:)$

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valentinak56 [21]

Answer: Length = 28 feet and width = 9 feet

Step-by-step explanation:

Let x = width of the wall.

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$252= (10+2x)x\\\\\Rightarrow\ 252=10x+2x^2\\\\\Rightarrow\ 2x^2+10x-252=0\\\\\Rightarrow\ x^2+5x-126=0\\\\\Rightarrow\ x^2+14x-9x-126=0\\\\\Rightarrow\ (x+14)-9(x+14)=0\\\\\Rightarrow\ (x+14)(x-9)=0\\\\\Rightarrow\ x=-14 \ or \ x= 9$

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For fun question

ZanzabumX [31]

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$f(x)\approx f'(c)(x-c)+f(c)$

Let $c=64$ . Then $(63.97)^{1/3}$ can be estimated to be

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