Name the form of the equation, then find the y-intercept of the following lines
7x+y=-5

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Ответ:

lkipjjjjjjjjjj2272

07.05.2022

Mathematics

Therefore, Option 'A' is correct.

Step-by-step explanation:

Since we have given that

Two class midpoints are 62.5 and 65.5

So, the class interval would be

65.5-62.5=3

So, the limits of lower class are $x_1\ and\ x_2$

The limits of upper class are $x_2\ and\ x_3$

So, it becomes,

$\dfrac{x_1+x_2}{2}=62.5\\\\x_1+x_2=62.5\times 2=125$

and

$\dfrac{x_2+x_3}{2}=65.5\\\\x_2+x_3=65.5\times 2=131$

Since we have given that interval is 3.

So, $x_2-x_1=3\ and\ x_3-x_2=3$

So, by solving all the questions, we get that

$x_2+x_1=125\\\\x_2-x_1=3\\\\-------------------------\\\\2x_2=128\\\\x_2=64\\\\x_2-x_1=3\\\\64-x_1=3\\\\x_1=61\\\\and\\\\x_3-x_2=3\\\\x_3-64=3\\\\x_3=67$

Hence, the class limits would be

(61,64) and (64,67).

And the class limits of lowest class are 61 and 64.

Therefore, Option 'A' is correct.

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Name the form of the equation, then find the y-intercept of the following lines 7x+y=-5