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3 years ago

How to solve this question ineed solution too

Mathematics

2 answers:

vesna_86 [32]3 years ago

6 0

Y=2+x 3/x+2+ 4/2+x)x=1= 3(x+2)/x(x+2)+4x/x(x+2)=1
y=2+x 3(x+2)+4x=x(x+2)=3x+6+4x= x^2+2x
0=x^2+2x-3x-6x-4x=0
x^2-5x-6=0
a b c
x12= formula -b+- radical b^2-4ac divided by 2a=5+-radical 25+24 divided by 2
5+-7 divided by 2 = 6,-1 answer for x and y

harina [27]3 years ago

5 0

The answer is: -3y/-y+4

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Step-by-step explanation:

Let the total distance from home to New York is x miles,

$\text{ Since, Time} = \frac{\text{Distance}}{\text{Speed}}$

Also, he drove his car from his home to New York at the rate of 45 mph,

⇒ $\text{ Time taken by him in going } = \frac{x}{45}\text{ hours}$

And, returned over the same road at the rate of 40 mph.

⇒ $\text{ Time taken by him in returning } = \frac{x}{40}\text{ hours}$

According to the question,

Time taken by him in returning - Time taken by him in going = 30 minutes = 1/2 hours, ( 1 hours = 60 minutes )

⇒ $\frac{x}{40}-\frac{x}{45}=\frac{1}{2}$

⇒ $\frac{9x}{360}-\frac{8x}{360}=\frac{1}{2}$

⇒ $\frac{x}{360} = \farc{1}{2}$

⇒ $2x=720$

⇒ $x=360\text{ miles}$

Hence, the total distance from home to New York = x miles = 360 miles

⇒ $\text{ Time taken by him in going } = \frac{x}{45}\text{ hours}$

$=\frac{360}{45}=8\text{ hours}$

⇒ $\text{ Time taken by him in returning } = \frac{x}{40}\text{ hours}$

$=\frac{360}{40}=9\text{ hours}$

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