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3 years ago

13

A person on a moving sidewalk travels 21 feet in 7 seconds.the moving sidewalk has a length of 180 feet how long wil it take to

move from one end of the sidewalk to the other

1 answer:

Nastasia [14]3 years ago

6 0

21 feet per 7 seconds = 21 ÷ 7 = 3 ft/s

180 ft ÷ 3ft/s = 60 seconds! (1 minute)

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3 years ago

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First you need to find what 2/3 equals
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4 years ago

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Semmy [17]

Answer:

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Step-by-step explanation:

Using the rules of exponents

$a^{m}$ × $a^{n}$ = $a^{(m+n)}$ , $\frac{a^{m} }{a^{n} }$ = $a^{(m-n)}$ , $(a^m)^{n}$ = $a^{mn}$

Simplifying the product of the first 2 terms

$\frac{a^{p^2+pq} }{a^{pq+q^2} }$ × $\frac{a^{q^2+qr} }{a^{qr+r^2} }$

= $a^{p^2-q^2}$ × $a^{q^2-r^2}$

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Simplifying the third term

5( $(a^p+r)^{p-r}$

= 5 $a^{(p+r)(p-r)}$ = 5 $a^{(p^2-r^2)}$

Performing the division, that is

$\frac{a^{(p^2-r^2)} }{5a^{(p^2-r^2)} }$ ← cancel $a^{(p^2-r^2)}$ on numerator/ denominator leaves

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4 years ago

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