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3 years ago

HEEEEELLLLPPPPPPP THE VALUE OF X IS __

Mathematics

2 answers:

Lynna [10]3 years ago

4 0

Answer:

x=3

Step-by-step explanation:

25x+57+x=45x

26x+57=45x

57=19x

x=57/19

x=3

OLEGan [10]3 years ago

4 0

ANSWER

x=3

EXPLANATION

Use the exterior angle theorem:

25x°+(57+x)°=45x°

Group similar terms,

57=45x-25x-x

19x=57

Divide both sides by 19.

x=3

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Nesterboy [21]

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30 mph

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Let d = distance (in miles)

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Now all we have to do is solve the equation for v:

$\implies \dfrac{18(v+15)}{v(v+15)} +\dfrac{18v}{v(v+15)}=1$

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As v is positive, v = 30 only

So the average speed driving to the airport was 30 mph

(and the average speed driving from the airport was 45 mph)

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