What is 16 less than a number

Mathematics

2 answers:

Gre4nikov [31]3 years ago

7 0

Less than mean subtracting

bogdanovich [222]3 years ago

4 0

X-16 in algebraic expression.

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Answer:

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mash [69]

Answer:

Step-by-step explanation:

Mean (Average) 5

Median 4

Range 9

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3 years ago

Completely factor the polynomial. 4x^2 20x 25

Sergeu [11.5K]

I use the railroad method so here's how I would solve it:
4 x 25 = 100
10 x 10 = 100, 10 + 10 = 20
(x +10/4)(x + 10/4)
(x + 5/2)(x + 5/2)
The answer should be: (2x + 5)(2x + 5)

It can be checked:
2x x 2x = 4x^2
2x x 5 = 10x
5 x 2x = 10x
5 x 5 = 25
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So yes, the answer would be (2x + 5)(2x + 5)

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3 years ago

A round mirror has a circumference of 87.92 inches. Calculate the area of the mirror.

Zarrin [17]

$\bf \textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ C=87.92 \end{cases}\implies 87.92=2\pi r\implies \cfrac{87.92}{2\pi }=\boxed{r} \\\\[-0.35em] ~\dotfill\\\\ \textit{area of a circle}\\\\ A=\pi r^2~\hspace{7em}A=\pi \left( \boxed{\frac{87.92}{2\pi }} \right)^2 \\\\\\ A=\pi \cdot \cfrac{87.92^2}{4\pi^2}\implies A=\cfrac{87.92^2}{4\pi }\implies A\approx 615.127998$

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