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vladimir2022 [97]
3 years ago
14

a person enters a building on the first floor and runs up to the third floor in 30 seconds at this rate, how many seconds will i

t take the person to run from the first floor up to the 6th floor in the building?
Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
4 0
It will take 60 seconds. Because they went in at the first floor and ran up to the third in 30 seconds, if they go down and go up to the 6th floor it would be a minute, because 30+30 is 60
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Answer:

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2 years ago
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Help I'm confused with this question​
alukav5142 [94]
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Change the fraction w-3/w+5 into an equivalent fraction with the denominator w2 + w – 20.
viktelen [127]
ANSWER

\frac{ {w}^{2}  - 7w + 12}{ {w}^{2}  + w - 20 }

EXPLANATION


The given fraction is,

\frac{w - 3}{w + 5}

To get an equivalent fraction, we multiply both the numerator and the denominator by the same quantity that will give us

w²+w-20

in the denominator.


This implies that,

\frac{w - 3}{w + 5}  =  \frac{(w - 3)(w - 4)}{(w + 5)(w - 4)}

We multiply out the numerators and denominators using the distributive property to obtain,


\frac{w - 3}{w + 5}  =  \frac{ {w}^{2}  - 4w - 3w + 12}{ {w}^{2} - 4w + 5w - 20 }

This simplifies to

\frac{w - 3}{w + 5}  =  \frac{ {w}^{2}  - 7w + 12}{ {w}^{2}  + w - 20 }


5 0
3 years ago
A crew will arrive in one week and begin filming a city for a movie. The mayor is desperate to clean the city streets before fil
Zigmanuir [339]

Answer:

See below in bold.

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You work in fractions of the city streets done per hour:

1/200 + 1/400 = 1 /x  where x is the number of hours taken by 2 teams.

Multiply through by the LCM 400x:

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3 years ago
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Answer:

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minus 8x from both side you get

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y=(14-8x) divided by 2

thats the furthest it can be simplified

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2 years ago
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