3 years ago

Expand (–5a^2+2a+3)(4a^2–2a+1)

Mathematics

1 answer:

fiasKO [112]3 years ago

6 0

Answer:

Step-by-step explanation:

a • (a - 2) • (2a - 1)

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A package of 5 pairs of insulated socks costs $26.45. What is the unit price of the pairs of socks?

tigry1 [53]

Answer:

$5.29 per pair of socks

Step-by-step explanation:

26.45/5=5.29

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2 years ago

The moon has a surface area of approximately 14,650,000 m^2. Estimate its radius to the nearest mile

Elza [17]

$\bf \textit{surface area of a sphere}\\\\ SA=4\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ A=14650000 \end{cases}\implies 14650000=4\pi r^2 \\\\\\ \cfrac{14650000}{4\pi }=r^2\implies \cfrac{3662500}{\pi }=r^2\implies \sqrt{\cfrac{3662500}{\pi }}=r\implies 1079.73\approx r$