3 years ago

Line e has a slope of –5/8.Line f is perpendicular to e.What is the slope of line f?

Mathematics

1 answer:

Varvara68 [4.7K]3 years ago

3 0

Answer:

8/5

Step-by-step explanation:

opposite reciprocal

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A police car's siren operates at a frequency of 2,000 Hz. What frequency would a stationary listener observe if the police car i

SpyIntel [72]

we can use formula

$f_L=f_s(\frac{v_a-v_p}{v_a+v_p} )$

where

fL is listener frequency

fs is siren frequency

va is the speed of sound in air

vs is police car speed

so, we have

$f_s=2000Hz$

$v_a=345m/s$

$v_p=65mph$

now, we can change it into m/s

$v_p=65*\frac{1609}{3600}m/s$

$v_p=29.05139m/s$

now, we can plug it

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3 years ago