Question

1) 81,5у – 63 + 2 – 99,4y + 642 при у = 10; 2 = -1 :​

Answer 1

Ответ:

при у=10 402

Объяснение:

81.5*10-63+2-99.4*10+642

815-63+2-994+642

754-994+642

-240+642=402

Answer 2

To evaluate the given expression, let's substitute the value of y = 10 into the expression:

1. 81.5 * 10 - 63 + 2 - 99.4 * 10 + 642

First, perform the multiplications and additions/subtractions:

= 815 - 63 + 2 - 994 + 642 = 752 + 2 - 994 + 642 = 754 - 994 + 642 = -240 + 642 = 402

So, when y = 10, the value of the expression is 402.

Regarding the second part of your question, it seems to be incomplete. The expression "2 = -1" does not make sense as an equation. Could you please provide additional information or clarify the second part of your question?