3 years ago

A cube has a side length of 16 in. Use the formula S = 6s squared to find the area/surface.

1 answer:

3 0

I'm assuming side length is the variable S, so you do 16 squared (256) times 6 (1,536) As your final answer. This may be wrong, as I may be interpreting wrong.

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(-x-3)-(5x+2) I need to know the work and answer

olasank [31]

Answer:

-6x-5

Step-by-step explanation:

remove the parentheses

collect the like terms (-x and -5x, -3 and -2)

evaluate

6 0

3 years ago

Ad is tangent to circle o at d. find ab. round to the nearest tenth if necessary

Naddik [55]

Check the picture below.

$\bf 0=AB^2+6AB-121\implies \stackrel{\textit{using the quadratic formula}}{AB=\cfrac{-6 \pm \sqrt{6^2-4(1)(-121)}}{2(1)}}
\\\\\\
AB=\cfrac{-6 \pm \sqrt{520}}{2}\implies AB=\cfrac{-6 \pm \sqrt{4\cdot 130}}{2}
\\\\\\
AB=\cfrac{-6 \pm \sqrt{2^2\cdot 130}}{2}\implies AB=\cfrac{-6 \pm 2\sqrt{130}}{2}
\\\\\\
AB=-3\pm\sqrt{130}\implies AB=
\begin{cases}
\boxed{-3+\sqrt{130}}\\\\
-3-\sqrt{130}
\end{cases}$

since the distance AB cannot be a negative value, thus is not -3-√(130).