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4 years ago

What is 440 = -7(8n + 1)-1

Mathematics

1 answer:

Vlada [557]4 years ago

3 0

Answer: n= -8

Step-by-step explanation:

440= -7(8n+1)-1

440= -56n-7-1

440= -56n-8

56n= -8-440

56n= -448

n= -8

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iVinArrow [24]

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3 years ago

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What is the difference in speed between two cars when one traveled 175 km in 4 hours and the other traveled the same distance in

vovangra [49]

<h3>Given :</h3>

Distance = 175
Time 1 = 4 hours

$\\ \\$

Different between two speeds when distance is same.

$\\ \\$

<h3>Solution:</h3>

In first part we will find speed 1 in which time is 4 hours

we know:-

$\bigstar \boxed{ \rm speed = \frac{distance}{time} }$

So:-

$\dashrightarrow\sf speed_1 = \dfrac{distance}{time_1}$

$\\ \\$

$\dashrightarrow\sf speed_1 = \dfrac{175}{4}$

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$\dashrightarrow\bf speed_1 = 43.75 \: km {h}^{ - 1}$

In first part we will find speed 2 in which time is 3 hours

Again:

$\bigstar \boxed{ \rm speed = \frac{distance}{time} }$

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$\dashrightarrow\sf speed_2 = \dfrac{distance}{time_2}$

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$\dashrightarrow\sf speed_2 = \dfrac{175}{3}$

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$\dashrightarrow\bf speed_2 = 58.33kmh^{-1}$

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In this part we will find different between speed 1 and speed 2

$\bigstar \boxed{\rm Difference = speed_2 - speed_1}$

$\\ \\$

So :

$\dashrightarrow\sf Difference = speed_2 - speed_1 \\$

$\\ \\$

$\dashrightarrow\sf Difference =58.33 - 43.75\\$

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$\dashrightarrow\bf Difference =14.58kmh^{-1}\\$

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$\therefore \underline {\textsf{\textbf{Difference in speed between two cars is \red{14.58km/h}}}}$

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Nezavi [6.7K]

0.3021148036 would be your answer

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