Question

Y/5•7Y/Y при Y=2 xy+y^2/5•11/(x+y) при x=0,y=15

Answer 1

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Answer 2

Let's solve the expressions step by step.

1. Y/5 * 7Y/Y

When Y is multiplied by 7Y/Y, the Y term in the denominator cancels out with the Y term in the numerator. So, we are left with:

(7Y/Y) = 7

Now, we have:

Y/5 * 7 = 7Y/5

2. (xy + y^2) / (5 * 11) / (x + y)

Substitute x = 0 and y = 15 into the expression:

(0*15 + 15^2) / (5 * 11) / (0 + 15)

Simplify:

(0 + 225) / 55 / 15

Now, perform the division:

225 / 55 / 15 ≈ 0.27273...

Please note that the result is an approximation rounded to five decimal places.

So, the final results are:

1. Y/5 * 7Y/Y = 7Y/5
2. (xy + y^2) / (5 * 11) / (x + y) ≈ 0.27273...